400100432 has 10 divisors (see below), whose sum is σ = 775194618. Its totient is φ = 200050208.

The previous prime is 400100429. The next prime is 400100447. The reversal of 400100432 is 234001004.

It can be written as a sum of positive squares in only one way, i.e., 264517696 + 135582736 = 16264^2 + 11644^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12503123 + ... + 12503154.

Almost surely, 2^400100432 is an apocalyptic number.

It is an amenable number.

400100432 is a deficient number, since it is larger than the sum of its proper divisors (375094186).

400100432 is a wasteful number, since it uses less digits than its factorization.

400100432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25006285 (or 25006279 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 400100432 is about 20002.5106424169. The cubic root of 400100432 is about 736.8679603430.

Adding to 400100432 its reverse (234001004), we get a palindrome (634101436).

The spelling of 400100432 in words is "four hundred million, one hundred thousand, four hundred thirty-two".