391406796 has 96 divisors (see below), whose sum is σ = 1110869760. Its totient is φ = 118195200.

The previous prime is 391406789. The next prime is 391406833. The reversal of 391406796 is 697604193.

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, 678060 + ... + 678636.

It is an arithmetic number, because the mean of its divisors is an integer number (11571560).

Almost surely, 2^391406796 is an apocalyptic number.

391406796 is a gapful number since it is divisible by the number (36) 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 391406796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555434880).

391406796 is an abundant number, since it is smaller than the sum of its proper divisors (719462964).

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

391406796 is a wasteful number, since it uses less digits than its factorization.

391406796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 391406796 is about 19784.0035382124. The cubic root of 391406796 is about 731.4917864486.

The spelling of 391406796 in words is "three hundred ninety-one million, four hundred six thousand, seven hundred ninety-six".