400324664 has 16 divisors (see below), whose sum is σ = 757625400. Its totient is φ = 198291232.

The previous prime is 400324663. The next prime is 400324681. The reversal of 400324664 is 466423004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400324663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232979 + ... + 234690.

Almost surely, 2^400324664 is an apocalyptic number.

It is an amenable number.

400324664 is a deficient number, since it is larger than the sum of its proper divisors (357300736).

400324664 is a wasteful number, since it uses less digits than its factorization.

400324664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467782 (or 467778 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 400324664 is about 20008.1149536882. The cubic root of 400324664 is about 737.0055912192.

Adding to 400324664 its reverse (466423004), we get a palindrome (866747668).

The spelling of 400324664 in words is "four hundred million, three hundred twenty-four thousand, six hundred sixty-four".