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88013688 = 23371393769
BaseRepresentation
bin1010011111011…
…11101101111000
320010121120002020
411033233231320
5140012414223
612422234440
72116050450
oct517575570
9203546066
1088013688
1145754a94
1225585a20
1315307b09
14b990d60
157ad81e3
hex53efb78

88013688 has 64 divisors (see below), whose sum is σ = 253344000. Its totient is φ = 24959232.

The previous prime is 88013687. The next prime is 88013693. The reversal of 88013688 is 88631088.

It is a happy number.

It is a super-2 number, since 2×880136882 = 15492818550722688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88013687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21468 + ... + 25236.

It is an arithmetic number, because the mean of its divisors is an integer number (3958500).

Almost surely, 288013688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 88013688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126672000).

88013688 is an abundant number, since it is smaller than the sum of its proper divisors (165330312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

88013688 is a wasteful number, since it uses less digits than its factorization.

88013688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924 (or 3920 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 88013688 is about 9381.5610641300. The cubic root of 88013688 is about 444.8190789178.

The spelling of 88013688 in words is "eighty-eight million, thirteen thousand, six hundred eighty-eight".

Divisors: 1 2 3 4 6 7 8 12 14 21 24 28 42 56 84 139 168 278 417 556 834 973 1112 1668 1946 2919 3336 3769 3892 5838 7538 7784 11307 11676 15076 22614 23352 26383 30152 45228 52766 79149 90456 105532 158298 211064 316596 523891 633192 1047782 1571673 2095564 3143346 3667237 4191128 6286692 7334474 11001711 12573384 14668948 22003422 29337896 44006844 88013688