117660638 has 16 divisors (see below), whose sum is σ = 187926480. Its totient is φ = 55057536.

The previous prime is 117660623. The next prime is 117660671. The reversal of 117660638 is 836066711.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3581 + ... + 15752.

It is an arithmetic number, because the mean of its divisors is an integer number (11745405).

Almost surely, 2^117660638 is an apocalyptic number.

117660638 is a deficient number, since it is larger than the sum of its proper divisors (70265842).

117660638 is a wasteful number, since it uses less digits than its factorization.

117660638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19531.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 117660638 is about 10847.1488419769. The cubic root of 117660638 is about 490.0161566240.

The spelling of 117660638 in words is "one hundred seventeen million, six hundred sixty thousand, six hundred thirty-eight".