397873854 has 36 divisors (see below), whose sum is σ = 985766184. Its totient is φ = 113614272.

The previous prime is 397873837. The next prime is 397873867. The reversal of 397873854 is 458378793.

It is a self number, because there is not a number n which added to its sum of digits gives 397873854.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 223014 + ... + 224790.

It is an arithmetic number, because the mean of its divisors is an integer number (27382394).

Almost surely, 2^397873854 is an apocalyptic number.

397873854 is an abundant number, since it is smaller than the sum of its proper divisors (587892330).

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

397873854 is an equidigital number, since it uses as much as digits as its factorization.

397873854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569 (or 1789 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 397873854 is about 19946.7755288919. The cubic root of 397873854 is about 735.4985150604.

The spelling of 397873854 in words is "three hundred ninety-seven million, eight hundred seventy-three thousand, eight hundred fifty-four".