400432100 has 36 divisors (see below), whose sum is σ = 869985984. Its totient is φ = 159979680.

The previous prime is 400432091. The next prime is 400432103. The reversal of 400432100 is 1234004.

It is not an unprimeable number, because it can be changed into a prime (400432103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104417 + ... + 108183.

Almost surely, 2^400432100 is an apocalyptic number.

It is an amenable number.

400432100 is an abundant number, since it is smaller than the sum of its proper divisors (469553884).

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

400432100 is a wasteful number, since it uses less digits than its factorization.

400432100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4844 (or 4837 counting only the distinct ones).

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

The square root of 400432100 is about 20010.7995842245. The cubic root of 400432100 is about 737.0715159195.

Adding to 400432100 its reverse (1234004), we get a palindrome (401666104).

The spelling of 400432100 in words is "four hundred million, four hundred thirty-two thousand, one hundred".