400953988 has 6 divisors (see below), whose sum is σ = 701669486. Its totient is φ = 200476992.

The previous prime is 400953983. The next prime is 400953997. The reversal of 400953988 is 889359004.

It can be written as a sum of positive squares in only one way, i.e., 306320004 + 94633984 = 17502^2 + 9728^2 .

It is not an unprimeable number, because it can be changed into a prime (400953983) by changing a digit.

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, 50119245 + ... + 50119252.

Almost surely, 2^400953988 is an apocalyptic number.

It is an amenable number.

400953988 is a deficient number, since it is larger than the sum of its proper divisors (300715498).

400953988 is a wasteful number, since it uses less digits than its factorization.

400953988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100238501 (or 100238499 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 400953988 is about 20023.8354967274. The cubic root of 400953988 is about 737.3915883160.

The spelling of 400953988 in words is "four hundred million, nine hundred fifty-three thousand, nine hundred eighty-eight".