117256640 has 56 divisors (see below), whose sum is σ = 283841952. Its totient is φ = 46126080.

The previous prime is 117256639. The next prime is 117256649. The reversal of 117256640 is 46652711.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 117256597 and 117256606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117256649) 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, 16517 + ... + 22523.

Almost surely, 2^117256640 is an apocalyptic number.

117256640 is a gapful number since it is divisible by the number (10) 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 117256640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141920976).

117256640 is an abundant number, since it is smaller than the sum of its proper divisors (166585312).

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

117256640 is an equidigital number, since it uses as much as digits as its factorization.

117256640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6085 (or 6075 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 117256640 is about 10828.5105162252. The cubic root of 117256640 is about 489.4546758516.

The spelling of 117256640 in words is "one hundred seventeen million, two hundred fifty-six thousand, six hundred forty".