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69888012 = 22331187871
BaseRepresentation
bin1000010101001…
…10100000001100
311212111200022220
410022212200030
5120342404022
610533535340
71506016065
oct412464014
9155450286
1069888012
11364a4997
121b4a4550
131162c86c
1493d356c
15620785c
hex42a680c

69888012 has 24 divisors (see below), whose sum is σ = 168333312. Its totient is φ = 22544400.

The previous prime is 69888011. The next prime is 69888031. The reversal of 69888012 is 21088896.

It is not an unprimeable number, because it can be changed into a prime (69888011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93564 + ... + 94307.

It is an arithmetic number, because the mean of its divisors is an integer number (7013888).

Almost surely, 269888012 is an apocalyptic number.

69888012 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

69888012 is an abundant number, since it is smaller than the sum of its proper divisors (98445300).

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

69888012 is a wasteful number, since it uses less digits than its factorization.

69888012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187909 (or 187907 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 69888012 is about 8359.9050233839. The cubic root of 69888012 is about 411.9086343416.

It can be divided in two parts, 698880 and 12, that multiplied together give a triangular number (8386560 = T4095).

The spelling of 69888012 in words is "sixty-nine million, eight hundred eighty-eight thousand, twelve".

Divisors: 1 2 3 4 6 12 31 62 93 124 186 372 187871 375742 563613 751484 1127226 2254452 5824001 11648002 17472003 23296004 34944006 69888012