117565128 has 64 divisors (see below), whose sum is σ = 327456000. Its totient is φ = 39082176.

The previous prime is 117565109. The next prime is 117565177. The reversal of 117565128 is 821565711.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 117565092 and 117565101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154926 + ... + 155682.

It is an arithmetic number, because the mean of its divisors is an integer number (5116500).

Almost surely, 2^117565128 is an apocalyptic number.

117565128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

117565128 is an abundant number, since it is smaller than the sum of its proper divisors (209890872).

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

117565128 is a wasteful number, since it uses less digits than its factorization.

117565128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491 (or 1481 counting only the distinct ones).

The product of its digits is 16800, while the sum is 36.

The square root of 117565128 is about 10842.7454087975. The cubic root of 117565128 is about 489.8835319468.

The spelling of 117565128 in words is "one hundred seventeen million, five hundred sixty-five thousand, one hundred twenty-eight".