391160880 has 320 divisors, whose sum is σ = 1493475840. Its totient is φ = 93312000.

The previous prime is 391160867. The next prime is 391160911. The reversal of 391160880 is 88061193.

391160880 is a `hidden beast` number, since 39 + 11 + 608 + 8 + 0 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2399679 + ... + 2399841.

It is an arithmetic number, because the mean of its divisors is an integer number (4667112).

Almost surely, 2^391160880 is an apocalyptic number.

391160880 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 391160880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746737920).

391160880 is an abundant number, since it is smaller than the sum of its proper divisors (1102314960).

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

391160880 is a wasteful number, since it uses less digits than its factorization.

391160880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 391160880 is about 19777.7875405719. The cubic root of 391160880 is about 731.3385586369.

The spelling of 391160880 in words is "three hundred ninety-one million, one hundred sixty thousand, eight hundred eighty".