397838394 has 24 divisors (see below), whose sum is σ = 870521652. Its totient is φ = 131299200.

The previous prime is 397838387. The next prime is 397838411. The reversal of 397838394 is 493838793.

It can be written as a sum of positive squares in 2 ways, for example, as 379665225 + 18173169 = 19485^2 + 4263^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 397838394.

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, 107599 + ... + 111234.

Almost surely, 2^397838394 is an apocalyptic number.

397838394 is an abundant number, since it is smaller than the sum of its proper divisors (472683258).

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

397838394 is a wasteful number, since it uses less digits than its factorization.

397838394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218942 (or 218939 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 397838394 is about 19945.8866436165. The cubic root of 397838394 is about 735.4766642888.

The spelling of 397838394 in words is "three hundred ninety-seven million, eight hundred thirty-eight thousand, three hundred ninety-four".