400032404 has 12 divisors (see below), whose sum is σ = 700328244. Its totient is φ = 199938624.

The previous prime is 400032383. The next prime is 400032407. The reversal of 400032404 is 404230004.

It can be written as a sum of positive squares in 2 ways, for example, as 114490000 + 285542404 = 10700^2 + 16898^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400032407) 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, 6899 + ... + 29114.

It is an arithmetic number, because the mean of its divisors is an integer number (58360687).

Almost surely, 2^400032404 is an apocalyptic number.

It is an amenable number.

400032404 is a deficient number, since it is larger than the sum of its proper divisors (300295840).

400032404 is a wasteful number, since it uses less digits than its factorization.

400032404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38794 (or 38792 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 400032404 is about 20000.8100835941. The cubic root of 400032404 is about 736.8261954170.

Adding to 400032404 its reverse (404230004), we get a palindrome (804262408).

The spelling of 400032404 in words is "four hundred million, thirty-two thousand, four hundred four".