400043632 has 40 divisors (see below), whose sum is σ = 844030800. Its totient is φ = 182956032.

The previous prime is 400043627. The next prime is 400043639. The reversal of 400043632 is 236340004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400043639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13873 + ... + 31504.

It is an arithmetic number, because the mean of its divisors is an integer number (21100770).

Almost surely, 2^400043632 is an apocalyptic number.

It is an amenable number.

400043632 is an abundant number, since it is smaller than the sum of its proper divisors (443987168).

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

400043632 is a wasteful number, since it uses less digits than its factorization.

400043632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45433 (or 45427 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 400043632 is about 20001.0907702555. The cubic root of 400043632 is about 736.8330890311.

Adding to 400043632 its reverse (236340004), we get a palindrome (636383636).

The spelling of 400043632 in words is "four hundred million, forty-three thousand, six hundred thirty-two".