400432252 has 12 divisors (see below), whose sum is σ = 764461656. Its totient is φ = 182014640.

The previous prime is 400432237. The next prime is 400432283. The reversal of 400432252 is 252234004.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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, 4550323 + ... + 4550410.

It is an arithmetic number, because the mean of its divisors is an integer number (63705138).

Almost surely, 2^400432252 is an apocalyptic number.

It is an amenable number.

400432252 is a deficient number, since it is larger than the sum of its proper divisors (364029404).

400432252 is a wasteful number, since it uses less digits than its factorization.

400432252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100748 (or 9100746 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 400432252 is about 20010.8033821733. The cubic root of 400432252 is about 737.0716091811.

Adding to 400432252 its reverse (252234004), we get a palindrome (652666256).

The spelling of 400432252 in words is "four hundred million, four hundred thirty-two thousand, two hundred fifty-two".