400034432 has 48 divisors (see below), whose sum is σ = 927071370. Its totient is φ = 171440640.

The previous prime is 400034413. The next prime is 400034443. The reversal of 400034432 is 234430004.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 339443776 + 60590656 = 18424^2 + 7784^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25619 + ... + 38162.

Almost surely, 2^400034432 is an apocalyptic number.

It is an amenable number.

400034432 is an abundant number, since it is smaller than the sum of its proper divisors (527036938).

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

400034432 is an equidigital number, since it uses as much as digits as its factorization.

400034432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63809 (or 63790 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 400034432 is about 20000.8607814764. The cubic root of 400034432 is about 736.8274405502.

Adding to 400034432 its reverse (234430004), we get a palindrome (634464436).

The spelling of 400034432 in words is "four hundred million, thirty-four thousand, four hundred thirty-two".