397954198394 has 32 divisors (see below), whose sum is σ = 608018285952. Its totient is φ = 195321600000.

The previous prime is 397954198363. The next prime is 397954198399. The reversal of 397954198394 is 493891459793.

It is a super-2 number, since 2×397954198394² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (397954198399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11718299 + ... + 11752209.

It is an arithmetic number, because the mean of its divisors is an integer number (19000571436).

Almost surely, 2^397954198394 is an apocalyptic number.

397954198394 is a deficient number, since it is larger than the sum of its proper divisors (210064087558).

397954198394 is a wasteful number, since it uses less digits than its factorization.

397954198394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34502.

The product of its digits is 264539520, while the sum is 71.

The spelling of 397954198394 in words is "three hundred ninety-seven billion, nine hundred fifty-four million, one hundred ninety-eight thousand, three hundred ninety-four".