396976788 has 90 divisors (see below), whose sum is σ = 1121256906. Its totient is φ = 121748832.

The previous prime is 396976777. The next prime is 396976829. The reversal of 396976788 is 887679693.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 274830084 + 122146704 = 16578^2 + 11052^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1292931 + ... + 1293237.

Almost surely, 2^396976788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 396976788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560628453).

396976788 is an abundant number, since it is smaller than the sum of its proper divisors (724280118).

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

396976788 is a wasteful number, since it uses less digits than its factorization.

396976788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 325 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The square root of 396976788 is about 19924.2763482140. The cubic root of 396976788 is about 734.9453353764.

The spelling of 396976788 in words is "three hundred ninety-six million, nine hundred seventy-six thousand, seven hundred eighty-eight".