399378676 has 12 divisors (see below), whose sum is σ = 700493472. Its totient is φ = 199237688.

The previous prime is 399378659. The next prime is 399378697. The reversal of 399378676 is 676873993.

It is a self number, because there is not a number n which added to its sum of digits gives 399378676.

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, 110920 + ... + 114463.

It is an arithmetic number, because the mean of its divisors is an integer number (58374456).

Almost surely, 2^399378676 is an apocalyptic number.

It is an amenable number.

399378676 is a deficient number, since it is larger than the sum of its proper divisors (301114796).

399378676 is a wasteful number, since it uses less digits than its factorization.

399378676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225830 (or 225828 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 58.

The square root of 399378676 is about 19984.4608633808. The cubic root of 399378676 is about 736.4246058323.

The spelling of 399378676 in words is "three hundred ninety-nine million, three hundred seventy-eight thousand, six hundred seventy-six".