399952736 has 48 divisors (see below), whose sum is σ = 831040560. Its totient is φ = 188951040.

The previous prime is 399952733. The next prime is 399952753. The reversal of 399952736 is 637259993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399952733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338066 + ... + 339246.

It is an arithmetic number, because the mean of its divisors is an integer number (17313345).

Almost surely, 2^399952736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399952736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415520280).

399952736 is an abundant number, since it is smaller than the sum of its proper divisors (431087824).

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

399952736 is a wasteful number, since it uses less digits than its factorization.

399952736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767 (or 1759 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 53.

The square root of 399952736 is about 19998.8183650935. The cubic root of 399952736 is about 736.7772782409. Note that the first 3 decimals are identical.

The spelling of 399952736 in words is "three hundred ninety-nine million, nine hundred fifty-two thousand, seven hundred thirty-six".