117565440 has 192 divisors, whose sum is σ = 389188800. Its totient is φ = 30277632.

The previous prime is 117565439. The next prime is 117565447. The reversal of 117565440 is 44565711.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117565447) 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, 1320916 + ... + 1321004.

It is an arithmetic number, because the mean of its divisors is an integer number (2027025).

Almost surely, 2^117565440 is an apocalyptic number.

117565440 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 117565440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194594400).

117565440 is an abundant number, since it is smaller than the sum of its proper divisors (271623360).

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

117565440 is an equidigital number, since it uses as much as digits as its factorization.

117565440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 117565440 is about 10842.7597962880. The cubic root of 117565440 is about 489.8839653053.

The spelling of 117565440 in words is "one hundred seventeen million, five hundred sixty-five thousand, four hundred forty".