400000432 has 20 divisors (see below), whose sum is σ = 834616720. Its totient is φ = 184615488.

The previous prime is 400000411. The next prime is 400000457. The reversal of 400000432 is 234000004.

It is a Harshad number since it is a multiple of its sum of digits (13).

400000432 is a modest number, since divided by 432 gives 400 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961332 + ... + 961747.

It is an arithmetic number, because the mean of its divisors is an integer number (41730836).

Almost surely, 2^400000432 is an apocalyptic number.

It is an amenable number.

400000432 is an abundant number, since it is smaller than the sum of its proper divisors (434616288).

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

400000432 is a wasteful number, since it uses less digits than its factorization.

400000432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923100 (or 1923094 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 400000432 is about 20000.0107999971. The cubic root of 400000432 is about 736.8065649782.

Adding to 400000432 its reverse (234000004), we get a palindrome (634000436).

The spelling of 400000432 in words is "four hundred million, four hundred thirty-two", and thus it is an aban number.