117788990 has 32 divisors (see below), whose sum is σ = 231922656. Its totient is φ = 42716160.

The previous prime is 117788989. The next prime is 117789013. The reversal of 117788990 is 99887711.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46394 + ... + 48866.

It is an arithmetic number, because the mean of its divisors is an integer number (7247583).

Almost surely, 2^117788990 is an apocalyptic number.

117788990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117788990 is a deficient number, since it is larger than the sum of its proper divisors (114133666).

117788990 is a wasteful number, since it uses less digits than its factorization.

117788990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924.

The product of its (nonzero) digits is 254016, while the sum is 50.

The square root of 117788990 is about 10853.0636227749. The cubic root of 117788990 is about 490.1942725423.

The spelling of 117788990 in words is "one hundred seventeen million, seven hundred eighty-eight thousand, nine hundred ninety".