392117880 has 128 divisors (see below), whose sum is σ = 1466657280. Its totient is φ = 81477120.

The previous prime is 392117879. The next prime is 392117881. The reversal of 392117880 is 88711293.

It is an interprime number because it is at equal distance from previous prime (392117879) and next prime (392117881).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (392117881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11979 + ... + 30458.

It is an arithmetic number, because the mean of its divisors is an integer number (11458260).

Almost surely, 2^392117880 is an apocalyptic number.

392117880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

392117880 is an abundant number, since it is smaller than the sum of its proper divisors (1074539400).

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

392117880 is a wasteful number, since it uses less digits than its factorization.

392117880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42469 (or 42465 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 392117880 is about 19801.9665690052. The cubic root of 392117880 is about 731.9344950192.

The spelling of 392117880 in words is "three hundred ninety-two million, one hundred seventeen thousand, eight hundred eighty".