400310252 has 24 divisors (see below), whose sum is σ = 727584480. Its totient is φ = 192551040.

The previous prime is 400310231. The next prime is 400310291. The reversal of 400310252 is 252013004.

It is a self number, because there is not a number n which added to its sum of digits gives 400310252.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2024 + ... + 28367.

It is an arithmetic number, because the mean of its divisors is an integer number (30316020).

Almost surely, 2^400310252 is an apocalyptic number.

It is an amenable number.

400310252 is a deficient number, since it is larger than the sum of its proper divisors (327274228).

400310252 is a wasteful number, since it uses less digits than its factorization.

400310252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30521 (or 30519 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 400310252 is about 20007.7547965783. The cubic root of 400310252 is about 736.9967468545.

Adding to 400310252 its reverse (252013004), we get a palindrome (652323256).

The spelling of 400310252 in words is "four hundred million, three hundred ten thousand, two hundred fifty-two".