400544232 has 32 divisors (see below), whose sum is σ = 1092394080. Its totient is φ = 121376960.

The previous prime is 400544231. The next prime is 400544251. The reversal of 400544232 is 232445004.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (400544231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758343 + ... + 758870.

It is an arithmetic number, because the mean of its divisors is an integer number (34137315).

Almost surely, 2^400544232 is an apocalyptic number.

It is an amenable number.

400544232 is an abundant number, since it is smaller than the sum of its proper divisors (691849848).

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

400544232 is a wasteful number, since it uses less digits than its factorization.

400544232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517233 (or 1517229 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 400544232 is about 20013.6011752008. The cubic root of 400544232 is about 737.1403095966.

Adding to 400544232 its reverse (232445004), we get a palindrome (632989236).

The spelling of 400544232 in words is "four hundred million, five hundred forty-four thousand, two hundred thirty-two".