399330256420 has 48 divisors (see below), whose sum is σ = 856998128448. Its totient is φ = 156244682880.

The previous prime is 399330256337. The next prime is 399330256453. The reversal of 399330256420 is 24652033993.

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 15 ways as a sum of consecutive naturals, for example, 218214 + ... + 919933.

It is an arithmetic number, because the mean of its divisors is an integer number (17854127676).

Almost surely, 2^399330256420 is an apocalyptic number.

It is an amenable number.

399330256420 is an abundant number, since it is smaller than the sum of its proper divisors (457667872028).

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

399330256420 is a wasteful number, since it uses less digits than its factorization.

399330256420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138540 (or 1138538 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 46.

The spelling of 399330256420 in words is "three hundred ninety-nine billion, three hundred thirty million, two hundred fifty-six thousand, four hundred twenty".