400475 has 12 divisors (see below), whose sum is σ = 505176. Its totient is φ = 314880.

The previous prime is 400471. The next prime is 400481. The reversal of 400475 is 574004.

It is not a de Polignac number, because 400475 - 2² = 400471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400471) 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, 1979 + ... + 2171.

It is an arithmetic number, because the mean of its divisors is an integer number (42098).

2⁴⁰⁰⁴⁷⁵ is an apocalyptic number.

400475 is a deficient number, since it is larger than the sum of its proper divisors (104701).

400475 is a wasteful number, since it uses less digits than its factorization.

400475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 400475 is about 632.8309410893. The cubic root of 400475 is about 73.7097836852.

Adding to 400475 its reverse (574004), we get a palindrome (974479).

The spelling of 400475 in words is "four hundred thousand, four hundred seventy-five".