399279278700 has 108 divisors (see below), whose sum is σ = 1255973315688. Its totient is φ = 106095494400.

The previous prime is 399279278689. The next prime is 399279278731. The reversal of 399279278700 is 7872972993.

399279278700 is a `hidden beast` number, since 3 + 99 + 279 + 278 + 7 + 0 + 0 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 536502 + ... + 1042301.

Almost surely, 2^399279278700 is an apocalyptic number.

399279278700 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399279278700 is an abundant number, since it is smaller than the sum of its proper divisors (856694036988).

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

399279278700 is a wasteful number, since it uses less digits than its factorization.

399279278700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579104 (or 1579094 counting only the distinct ones).

The product of its (nonzero) digits is 24004512, while the sum is 63.

The spelling of 399279278700 in words is "three hundred ninety-nine billion, two hundred seventy-nine million, two hundred seventy-eight thousand, seven hundred".