399782068 has 12 divisors (see below), whose sum is σ = 799564192. Its totient is φ = 171335160.

The previous prime is 399782057. The next prime is 399782087. The reversal of 399782068 is 860287993.

399782068 is an admirable number.

It is a congruent number.

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, 7138938 + ... + 7138993.

Almost surely, 2^399782068 is an apocalyptic number.

It is an amenable number.

399782068 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

399782068 is a wasteful number, since it uses less digits than its factorization.

399782068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14277942 (or 14277940 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 399782068 is about 19994.5509576984. The cubic root of 399782068 is about 736.6724640271.

The spelling of 399782068 in words is "three hundred ninety-nine million, seven hundred eighty-two thousand, sixty-eight".