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31060680 = 23357103359
BaseRepresentation
bin111011001111…
…1001011001000
32011110001020120
41312133023020
530422420210
63025423240
7525003630
oct166371310
964401216
1031060680
1116595392
12a49ab20
136586a01
1441a76c0
hex1d9f2c8

31060680 has 128 divisors (see below), whose sum is σ = 107827200. Its totient is φ = 7011072.

The previous prime is 31060669. The next prime is 31060681. The reversal of 31060680 is 8606013.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 31060680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31060681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86341 + ... + 86699.

It is an arithmetic number, because the mean of its divisors is an integer number (842400).

Almost surely, 231060680 is an apocalyptic number.

31060680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31060680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53913600).

31060680 is an abundant number, since it is smaller than the sum of its proper divisors (76766520).

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

31060680 is a wasteful number, since it uses less digits than its factorization.

31060680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 31060680 is about 5573.2109236956. The cubic root of 31060680 is about 314.3428982922.

Adding to 31060680 its reverse (8606013), we get a palindrome (39666693).

The spelling of 31060680 in words is "thirty-one million, sixty thousand, six hundred eighty".