400897928 has 12 divisors (see below), whose sum is σ = 751789815. Its totient is φ = 200420648.

The previous prime is 400897909. The next prime is 400897933. The reversal of 400897928 is 829798004.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 200448964 + 200448964 = 14158^2 + 14158^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14158.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 53093 + ... + 60171.

Almost surely, 2^400897928 is an apocalyptic number.

It is an amenable number.

400897928 is a deficient number, since it is larger than the sum of its proper divisors (350891887).

400897928 is an frugal number, since it uses more digits than its factorization.

400897928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14164 (or 7081 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 400897928 is about 20022.4356160783. The cubic root of 400897928 is about 737.3572202003.

The spelling of 400897928 in words is "four hundred million, eight hundred ninety-seven thousand, nine hundred twenty-eight".