397998774 has 24 divisors (see below), whose sum is σ = 874146312. Its totient is φ = 130848480.

The previous prime is 397998763. The next prime is 397998787. The reversal of 397998774 is 477899793.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150132 + ... + 152759.

It is an arithmetic number, because the mean of its divisors is an integer number (36422763).

Almost surely, 2^397998774 is an apocalyptic number.

397998774 is an abundant number, since it is smaller than the sum of its proper divisors (476147538).

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

397998774 is a wasteful number, since it uses less digits than its factorization.

397998774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302972 (or 302969 counting only the distinct ones).

The product of its digits is 24004512, while the sum is 63.

The square root of 397998774 is about 19949.9066163228. The cubic root of 397998774 is about 735.5754815492.

The spelling of 397998774 in words is "three hundred ninety-seven million, nine hundred ninety-eight thousand, seven hundred seventy-four".