117891550 has 36 divisors (see below), whose sum is σ = 255084120. Its totient is φ = 40419120.

The previous prime is 117891539. The next prime is 117891563. The reversal of 117891550 is 55198711.

It is a super-2 number, since 2×117891550² = 27796835122805000, which contains 22 as substring.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21610 + ... + 26509.

It is an arithmetic number, because the mean of its divisors is an integer number (7085670).

Almost surely, 2^117891550 is an apocalyptic number.

117891550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117891550 is an abundant number, since it is smaller than the sum of its proper divisors (137192570).

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

117891550 is a wasteful number, since it uses less digits than its factorization.

117891550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48145 (or 48133 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 37.

The square root of 117891550 is about 10857.7875278530. The cubic root of 117891550 is about 490.3365035499.

The spelling of 117891550 in words is "one hundred seventeen million, eight hundred ninety-one thousand, five hundred fifty".