400409575 has 12 divisors (see below), whose sum is σ = 499287240. Its totient is φ = 318534560.

The previous prime is 400409563. The next prime is 400409579. The reversal of 400409575 is 575904004.

It is not a de Polignac number, because 400409575 - 2⁵ = 400409543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400409575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400409579) 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, 40264 + ... + 49213.

It is an arithmetic number, because the mean of its divisors is an integer number (41607270).

Almost surely, 2^400409575 is an apocalyptic number.

400409575 is a deficient number, since it is larger than the sum of its proper divisors (98877665).

400409575 is a wasteful number, since it uses less digits than its factorization.

400409575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89666 (or 89661 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 400409575 is about 20010.2367552211. The cubic root of 400409575 is about 737.0576951434.

The spelling of 400409575 in words is "four hundred million, four hundred nine thousand, five hundred seventy-five".