399204396 has 48 divisors (see below), whose sum is σ = 1062957280. Its totient is φ = 129470400.

The previous prime is 399204361. The next prime is 399204397. The reversal of 399204396 is 693402993.

It is not an unprimeable number, because it can be changed into a prime (399204397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45955 + ... + 53946.

Almost surely, 2^399204396 is an apocalyptic number.

399204396 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

399204396 is an abundant number, since it is smaller than the sum of its proper divisors (663752884).

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

399204396 is a wasteful number, since it uses less digits than its factorization.

399204396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99951 (or 99943 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 399204396 is about 19980.0999997498. The cubic root of 399204396 is about 736.3174704565.

The spelling of 399204396 in words is "three hundred ninety-nine million, two hundred four thousand, three hundred ninety-six".