400613264 has 20 divisors (see below), whose sum is σ = 809936256. Its totient is φ = 191597472.

The previous prime is 400613263. The next prime is 400613299. The reversal of 400613264 is 462316004.

It is not an unprimeable number, because it can be changed into a prime (400613263) 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, 543944 + ... + 544679.

Almost surely, 2^400613264 is an apocalyptic number.

It is an amenable number.

400613264 is an abundant number, since it is smaller than the sum of its proper divisors (409322992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400613264 is a wasteful number, since it uses less digits than its factorization.

400613264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088654 (or 1088648 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 400613264 is about 20015.3257280515. The cubic root of 400613264 is about 737.1826547716.

Adding to 400613264 its reverse (462316004), we get a palindrome (862929268).

The spelling of 400613264 in words is "four hundred million, six hundred thirteen thousand, two hundred sixty-four".