399619672 has 16 divisors (see below), whose sum is σ = 749577600. Its totient is φ = 199732320.

The previous prime is 399619669. The next prime is 399619679. The reversal of 399619672 is 276916993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399619679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16329 + ... + 32647.

It is an arithmetic number, because the mean of its divisors is an integer number (46848600).

Almost surely, 2^399619672 is an apocalyptic number.

It is an amenable number.

399619672 is a deficient number, since it is larger than the sum of its proper divisors (349957928).

399619672 is a wasteful number, since it uses less digits than its factorization.

399619672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19386 (or 19382 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 52.

The square root of 399619672 is about 19990.4895387782. The cubic root of 399619672 is about 736.5727022874.

The spelling of 399619672 in words is "three hundred ninety-nine million, six hundred nineteen thousand, six hundred seventy-two".