117815880 has 128 divisors (see below), whose sum is σ = 435052800. Its totient is φ = 24855552.

The previous prime is 117815879. The next prime is 117815891. The reversal of 117815880 is 88518711.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5526 + ... + 16314.

It is an arithmetic number, because the mean of its divisors is an integer number (3398850).

Almost surely, 2^117815880 is an apocalyptic number.

117815880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117815880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217526400).

117815880 is an abundant number, since it is smaller than the sum of its proper divisors (317236920).

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

117815880 is a wasteful number, since it uses less digits than its factorization.

117815880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10823 (or 10819 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 39.

The square root of 117815880 is about 10854.3023727921. The cubic root of 117815880 is about 490.2315717869.

The spelling of 117815880 in words is "one hundred seventeen million, eight hundred fifteen thousand, eight hundred eighty".