400232656 has 20 divisors (see below), whose sum is σ = 775815300. Its totient is φ = 200022272.

The previous prime is 400232639. The next prime is 400232659. The reversal of 400232656 is 656232004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 231648400 + 168584256 = 15220^2 + 12984^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400232659) 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, 40140 + ... + 49108.

It is an arithmetic number, because the mean of its divisors is an integer number (38790765).

Almost surely, 2^400232656 is an apocalyptic number.

It is an amenable number.

400232656 is a deficient number, since it is larger than the sum of its proper divisors (375582644).

400232656 is a wasteful number, since it uses less digits than its factorization.

400232656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11766 (or 11760 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 400232656 is about 20005.8155544832. The cubic root of 400232656 is about 736.9491240463.

The spelling of 400232656 in words is "four hundred million, two hundred thirty-two thousand, six hundred fifty-six".