399761268 has 12 divisors (see below), whose sum is σ = 932776320. Its totient is φ = 133253752.

The previous prime is 399761267. The next prime is 399761269. The reversal of 399761268 is 862167993.

It is an interprime number because it is at equal distance from previous prime (399761267) and next prime (399761269).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 399761268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399761267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16656708 + ... + 16656731.

It is an arithmetic number, because the mean of its divisors is an integer number (77731360).

Almost surely, 2^399761268 is an apocalyptic number.

It is an amenable number.

399761268 is an abundant number, since it is smaller than the sum of its proper divisors (533015052).

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

399761268 is a wasteful number, since it uses less digits than its factorization.

399761268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33313446 (or 33313444 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 399761268 is about 19994.0308092190. The cubic root of 399761268 is about 736.6596878555.

The spelling of 399761268 in words is "three hundred ninety-nine million, seven hundred sixty-one thousand, two hundred sixty-eight".