117621540 has 72 divisors (see below), whose sum is σ = 372310848. Its totient is φ = 30000960.

The previous prime is 117621529. The next prime is 117621551. The reversal of 117621540 is 45126711.

It is a happy number.

117621540 is a `hidden beast` number, since 117 + 6 + 2 + 1 + 540 = 666.

It is an interprime number because it is at equal distance from previous prime (117621529) and next prime (117621551).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10066 + ... + 18345.

It is an arithmetic number, because the mean of its divisors is an integer number (5170984).

Almost surely, 2^117621540 is an apocalyptic number.

117621540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117621540 is an abundant number, since it is smaller than the sum of its proper divisors (254689308).

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

117621540 is a wasteful number, since it uses less digits than its factorization.

117621540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28449 (or 28444 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 117621540 is about 10845.3464674947. The cubic root of 117621540 is about 489.9618740293.

The spelling of 117621540 in words is "one hundred seventeen million, six hundred twenty-one thousand, five hundred forty".