400232564 has 24 divisors (see below), whose sum is σ = 746350920. Its totient is φ = 187140096.

The previous prime is 400232563. The next prime is 400232579. The reversal of 400232564 is 465232004.

It can be written as a sum of positive squares in 4 ways, for example, as 164916964 + 235315600 = 12842^2 + 15340^2 .

It is a super-2 number, since 2×400232564² = 320372210572028192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400232563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8069 + ... + 29420.

It is an arithmetic number, because the mean of its divisors is an integer number (31097955).

Almost surely, 2^400232564 is an apocalyptic number.

It is an amenable number.

400232564 is a deficient number, since it is larger than the sum of its proper divisors (346118356).

400232564 is a wasteful number, since it uses less digits than its factorization.

400232564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37667 (or 37665 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 400232564 is about 20005.8132551516. The cubic root of 400232564 is about 736.9490675797.

Adding to 400232564 its reverse (465232004), we get a palindrome (865464568).

The spelling of 400232564 in words is "four hundred million, two hundred thirty-two thousand, five hundred sixty-four".