391112880 has 160 divisors (see below), whose sum is σ = 1292220864. Its totient is φ = 97517568.

The previous prime is 391112851. The next prime is 391112921. The reversal of 391112880 is 88211193.

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, 1048374 + ... + 1048746.

Almost surely, 2^391112880 is an apocalyptic number.

391112880 is a gapful number since it is divisible by the number (30) 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 391112880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646110432).

391112880 is an abundant number, since it is smaller than the sum of its proper divisors (901107984).

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

391112880 is a wasteful number, since it uses less digits than its factorization.

391112880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 391112880 is about 19776.5740207954. The cubic root of 391112880 is about 731.3086428242.

The spelling of 391112880 in words is "three hundred ninety-one million, one hundred twelve thousand, eight hundred eighty".