400000799256 has 16 divisors (see below), whose sum is σ = 1000001998200. Its totient is φ = 133333599744.

The previous prime is 400000799239. The next prime is 400000799299. The reversal of 400000799256 is 652997000004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8333349961 + ... + 8333350008.

Almost surely, 2^400000799256 is an apocalyptic number.

It is an amenable number.

400000799256 is an abundant number, since it is smaller than the sum of its proper divisors (600001198944).

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

400000799256 is a wasteful number, since it uses less digits than its factorization.

400000799256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16666699978 (or 16666699974 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 400000799256 in words is "four hundred billion, seven hundred ninety-nine thousand, two hundred fifty-six".