400440232 has 16 divisors (see below), whose sum is σ = 751037760. Its totient is φ = 200163504.

The previous prime is 400440217. The next prime is 400440239. The reversal of 400440232 is 232044004.

It is not an unprimeable number, because it can be changed into a prime (400440239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51633 + ... + 58879.

It is an arithmetic number, because the mean of its divisors is an integer number (46939860).

Almost surely, 2^400440232 is an apocalyptic number.

It is an amenable number.

400440232 is a deficient number, since it is larger than the sum of its proper divisors (350597528).

400440232 is a wasteful number, since it uses less digits than its factorization.

400440232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14160 (or 14156 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 400440232 is about 20011.0027734744. The cubic root of 400440232 is about 737.0765053838.

Adding to 400440232 its reverse (232044004), we get a palindrome (632484236).

The spelling of 400440232 in words is "four hundred million, four hundred forty thousand, two hundred thirty-two".