399246290972 has 24 divisors (see below), whose sum is σ = 725995425792. Its totient is φ = 191904318000.

The previous prime is 399246290959. The next prime is 399246290999. The reversal of 399246290972 is 279092642993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10642628 + ... + 10680075.

It is an arithmetic number, because the mean of its divisors is an integer number (30249809408).

Almost surely, 2^399246290972 is an apocalyptic number.

It is an amenable number.

399246290972 is a deficient number, since it is larger than the sum of its proper divisors (326749134820).

399246290972 is a wasteful number, since it uses less digits than its factorization.

399246290972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21322889 (or 21322887 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 62.

The spelling of 399246290972 in words is "three hundred ninety-nine billion, two hundred forty-six million, two hundred ninety thousand, nine hundred seventy-two".