399296767680 has 84 divisors (see below), whose sum is σ = 1373414517072. Its totient is φ = 106479137280.

The previous prime is 399296767651. The next prime is 399296767687. The reversal of 399296767680 is 86767692993.

399296767680 is a `hidden beast` number, since 399 + 2 + 96 + 7 + 6 + 76 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 399296767599 and 399296767608.

It is not an unprimeable number, because it can be changed into a prime (399296767687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69319476 + ... + 69325235.

Almost surely, 2^399296767680 is an apocalyptic number.

399296767680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399296767680 is an abundant number, since it is smaller than the sum of its proper divisors (974117749392).

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

399296767680 is a wasteful number, since it uses less digits than its factorization.

399296767680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138644734 (or 138644721 counting only the distinct ones).

The product of its (nonzero) digits is 370355328, while the sum is 72.

The spelling of 399296767680 in words is "three hundred ninety-nine billion, two hundred ninety-six million, seven hundred sixty-seven thousand, six hundred eighty".