400198272 has 32 divisors (see below), whose sum is σ = 1063027680. Its totient is φ = 133399296.

The previous prime is 400198219. The next prime is 400198277. The reversal of 400198272 is 272891004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (400198277) 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 in 3 ways as a sum of consecutive naturals, for example, 520708 + ... + 521475.

It is an arithmetic number, because the mean of its divisors is an integer number (33219615).

Almost surely, 2^400198272 is an apocalyptic number.

It is an amenable number.

400198272 is an abundant number, since it is smaller than the sum of its proper divisors (662829408).

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

400198272 is a wasteful number, since it uses less digits than its factorization.

400198272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042200 (or 1042188 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 400198272 is about 20004.9561859055. The cubic root of 400198272 is about 736.9280196678.

The spelling of 400198272 in words is "four hundred million, one hundred ninety-eight thousand, two hundred seventy-two".