397791776 has 24 divisors (see below), whose sum is σ = 792593424. Its totient is φ = 196498240.

The previous prime is 397791731. The next prime is 397791803. The reversal of 397791776 is 677197793.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72230 + ... + 77541.

It is an arithmetic number, because the mean of its divisors is an integer number (33024726).

Almost surely, 2^397791776 is an apocalyptic number.

It is an amenable number.

397791776 is a deficient number, since it is larger than the sum of its proper divisors (394801648).

397791776 is a wasteful number, since it uses less digits than its factorization.

397791776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149864 (or 149856 counting only the distinct ones).

The product of its digits is 3500658, while the sum is 56.

The square root of 397791776 is about 19944.7179975050. The cubic root of 397791776 is about 735.4479358813.

The spelling of 397791776 in words is "three hundred ninety-seven million, seven hundred ninety-one thousand, seven hundred seventy-six".