397618776 has 48 divisors (see below), whose sum is σ = 1133566200. Its totient is φ = 125563392.

The previous prime is 397618769. The next prime is 397618789. The reversal of 397618776 is 677816793.

397618776 is a `hidden beast` number, since 397 + 6 + 187 + 76 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143961 + ... + 146696.

Almost surely, 2^397618776 is an apocalyptic number.

397618776 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

397618776 is an abundant number, since it is smaller than the sum of its proper divisors (735947424).

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

397618776 is a wasteful number, since it uses less digits than its factorization.

397618776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290688 (or 290681 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 397618776 is about 19940.3805379938. The cubic root of 397618776 is about 735.3413047663.

The spelling of 397618776 in words is "three hundred ninety-seven million, six hundred eighteen thousand, seven hundred seventy-six".