399974272 has 32 divisors (see below), whose sum is σ = 797827680. Its totient is φ = 199735296.

The previous prime is 399974269. The next prime is 399974287. The reversal of 399974272 is 272479993.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139768 + ... + 142600.

It is an arithmetic number, because the mean of its divisors is an integer number (24932115).

Almost surely, 2^399974272 is an apocalyptic number.

399974272 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

399974272 is a deficient number, since it is larger than the sum of its proper divisors (397853408).

399974272 is a wasteful number, since it uses less digits than its factorization.

399974272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950 (or 3938 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 52.

The square root of 399974272 is about 19999.3567896570. The cubic root of 399974272 is about 736.7905022623.

The spelling of 399974272 in words is "three hundred ninety-nine million, nine hundred seventy-four thousand, two hundred seventy-two".