400579975 has 6 divisors (see below), whose sum is σ = 496719200. Its totient is φ = 320463960.

The previous prime is 400579967. The next prime is 400579979. The reversal of 400579975 is 579975004.

It is a happy number.

It is not a de Polignac number, because 400579975 - 2³ = 400579967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400579979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8011575 + ... + 8011624.

Almost surely, 2^400579975 is an apocalyptic number.

400579975 is a deficient number, since it is larger than the sum of its proper divisors (96139225).

400579975 is a wasteful number, since it uses less digits than its factorization.

400579975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16023209 (or 16023204 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 46.

The square root of 400579975 is about 20014.4941230100. The cubic root of 400579975 is about 737.1622354500.

The spelling of 400579975 in words is "four hundred million, five hundred seventy-nine thousand, nine hundred seventy-five".