117921320 has 32 divisors (see below), whose sum is σ = 289444320. Its totient is φ = 42880320.

The previous prime is 117921317. The next prime is 117921329. The reversal of 117921320 is 23129711.

It is a self number, because there is not a number n which added to its sum of digits gives 117921320.

It is not an unprimeable number, because it can be changed into a prime (117921329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133562 + ... + 134441.

It is an arithmetic number, because the mean of its divisors is an integer number (9045135).

Almost surely, 2^117921320 is an apocalyptic number.

117921320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117921320 is an abundant number, since it is smaller than the sum of its proper divisors (171523000).

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

117921320 is a wasteful number, since it uses less digits than its factorization.

117921320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268025 (or 268021 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 117921320 is about 10859.1583467597. The cubic root of 117921320 is about 490.3777733700.

The spelling of 117921320 in words is "one hundred seventeen million, nine hundred twenty-one thousand, three hundred twenty".