396913920 has 144 divisors (see below), whose sum is σ = 1365326592. Its totient is φ = 97689600.

The previous prime is 396913903. The next prime is 396913931. The reversal of 396913920 is 29319693.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45945 + ... + 53895.

Almost surely, 2^396913920 is an apocalyptic number.

396913920 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 396913920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (682663296).

396913920 is an abundant number, since it is smaller than the sum of its proper divisors (968412672).

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

396913920 is a wasteful number, since it uses less digits than its factorization.

396913920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7988 (or 7974 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 42.

The square root of 396913920 is about 19922.6986123868. The cubic root of 396913920 is about 734.9065363130.

The spelling of 396913920 in words is "three hundred ninety-six million, nine hundred thirteen thousand, nine hundred twenty".