399752056 has 24 divisors (see below), whose sum is σ = 823871160. Its totient is φ = 181705040.

The previous prime is 399752053. The next prime is 399752071. The reversal of 399752056 is 650257993.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 399751997 and 399752015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399752053) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 205516 + ... + 207451.

It is an arithmetic number, because the mean of its divisors is an integer number (34327965).

Almost surely, 2^399752056 is an apocalyptic number.

It is an amenable number.

399752056 is an abundant number, since it is smaller than the sum of its proper divisors (424119104).

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

399752056 is a wasteful number, since it uses less digits than its factorization.

399752056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412995 (or 412980 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 46.

The square root of 399752056 is about 19993.8004391361. The cubic root of 399752056 is about 736.6540293440.

It can be divided in two parts, 39975205 and 6, that added together give a triangular number (39975211 = T₈₉₄₁).

The spelling of 399752056 in words is "three hundred ninety-nine million, seven hundred fifty-two thousand, fifty-six".