399235648 has 28 divisors (see below), whose sum is σ = 905410432. Its totient is φ = 171100800.

The previous prime is 399235637. The next prime is 399235651. The reversal of 399235648 is 846532993.

It is a tau number, because it is divible by the number of its divisors (28).

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, 445128 + ... + 446023.

Almost surely, 2^399235648 is an apocalyptic number.

It is an amenable number.

399235648 is an abundant number, since it is smaller than the sum of its proper divisors (506174784).

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

399235648 is an equidigital number, since it uses as much as digits as its factorization.

399235648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891170 (or 891160 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 49.

The square root of 399235648 is about 19980.8820626118. The cubic root of 399235648 is about 736.3366843340.

The spelling of 399235648 in words is "three hundred ninety-nine million, two hundred thirty-five thousand, six hundred forty-eight".