399748616 has 16 divisors (see below), whose sum is σ = 761816940. Its totient is φ = 196597440.

The previous prime is 399748603. The next prime is 399748637. The reversal of 399748616 is 616847993.

It can be written as a sum of positive squares in 2 ways, for example, as 386279716 + 13468900 = 19654^2 + 3670^2 .

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, 409091 + ... + 410066.

Almost surely, 2^399748616 is an apocalyptic number.

It is an amenable number.

399748616 is a deficient number, since it is larger than the sum of its proper divisors (362068324).

399748616 is a wasteful number, since it uses less digits than its factorization.

399748616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819224 (or 819220 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 53.

The square root of 399748616 is about 19993.7144122847. The cubic root of 399748616 is about 736.6519162866.

The spelling of 399748616 in words is "three hundred ninety-nine million, seven hundred forty-eight thousand, six hundred sixteen".