400513252 has 12 divisors (see below), whose sum is σ = 709770880. Its totient is φ = 197721576.

The previous prime is 400513219. The next prime is 400513303. The reversal of 400513252 is 252315004.

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, 633408 + ... + 634039.

Almost surely, 2^400513252 is an apocalyptic number.

It is an amenable number.

400513252 is a deficient number, since it is larger than the sum of its proper divisors (309257628).

400513252 is a wasteful number, since it uses less digits than its factorization.

400513252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267530 (or 1267528 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 400513252 is about 20012.8271865821. The cubic root of 400513252 is about 737.1213044583.

Adding to 400513252 its reverse (252315004), we get a palindrome (652828256).

The spelling of 400513252 in words is "four hundred million, five hundred thirteen thousand, two hundred fifty-two".