117865540 has 24 divisors (see below), whose sum is σ = 266558040. Its totient is φ = 43519488.

The previous prime is 117865523. The next prime is 117865543. The reversal of 117865540 is 45568711.

It can be written as a sum of positive squares in 4 ways, for example, as 26050816 + 91814724 = 5104^2 + 9582^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 117865540.

It is not an unprimeable number, because it can be changed into a prime (117865543) 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, 226405 + ... + 226924.

It is an arithmetic number, because the mean of its divisors is an integer number (11106585).

Almost surely, 2^117865540 is an apocalyptic number.

117865540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117865540 is an abundant number, since it is smaller than the sum of its proper divisors (148692500).

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

117865540 is a wasteful number, since it uses less digits than its factorization.

117865540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453351 (or 453349 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 117865540 is about 10856.5897039540. The cubic root of 117865540 is about 490.3004404888.

The spelling of 117865540 in words is "one hundred seventeen million, eight hundred sixty-five thousand, five hundred forty".