397951875 has 60 divisors (see below), whose sum is σ = 723705840. Its totient is φ = 210648000.

The previous prime is 397951871. The next prime is 397951877. The reversal of 397951875 is 578159793.

It is not a de Polignac number, because 397951875 - 2² = 397951871 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

Its product of digits (2381400) is a multiple of the sum of its prime divisors (540).

It is not an unprimeable number, because it can be changed into a prime (397951871) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1479241 + ... + 1479509.

It is an arithmetic number, because the mean of its divisors is an integer number (12061764).

Almost surely, 2^397951875 is an apocalyptic number.

397951875 is a deficient number, since it is larger than the sum of its proper divisors (325753965).

397951875 is a wasteful number, since it uses less digits than its factorization.

397951875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 540 counting only the distinct ones).

The product of its digits is 2381400, while the sum is 54.

The square root of 397951875 is about 19948.7311626579. The cubic root of 397951875 is about 735.5465877335.

The spelling of 397951875 in words is "three hundred ninety-seven million, nine hundred fifty-one thousand, eight hundred seventy-five".