117787920 has 40 divisors (see below), whose sum is σ = 365143296. Its totient is φ = 31410048.

The previous prime is 117787919. The next prime is 117787921. The reversal of 117787920 is 29787711.

It is an interprime number because it is at equal distance from previous prime (117787919) and next prime (117787921).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (117787921) 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, 245152 + ... + 245631.

Almost surely, 2^117787920 is an apocalyptic number.

117787920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117787920 is an abundant number, since it is smaller than the sum of its proper divisors (247355376).

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

117787920 is a wasteful number, since it uses less digits than its factorization.

117787920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490799 (or 490793 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 42.

The square root of 117787920 is about 10853.0143278262. The cubic root of 117787920 is about 490.1927882228.

The spelling of 117787920 in words is "one hundred seventeen million, seven hundred eighty-seven thousand, nine hundred twenty".