399284612 has 12 divisors (see below), whose sum is σ = 717633420. Its totient is φ = 194246496.

The previous prime is 399284603. The next prime is 399284621. The reversal of 399284612 is 216482993.

It is an interprime number because it is at equal distance from previous prime (399284603) and next prime (399284621).

It can be written as a sum of positive squares in 2 ways, for example, as 351037696 + 48246916 = 18736^2 + 6946^2 .

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, 1348787 + ... + 1349082.

It is an arithmetic number, because the mean of its divisors is an integer number (59802785).

Almost surely, 2^399284612 is an apocalyptic number.

It is an amenable number.

399284612 is a deficient number, since it is larger than the sum of its proper divisors (318348808).

399284612 is a wasteful number, since it uses less digits than its factorization.

399284612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697910 (or 2697908 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 399284612 is about 19982.1072962788. The cubic root of 399284612 is about 736.3667856170.

The spelling of 399284612 in words is "three hundred ninety-nine million, two hundred eighty-four thousand, six hundred twelve".