406644256 has 12 divisors (see below), whose sum is σ = 800580942. Its totient is φ = 203322112.

The previous prime is 406644253. The next prime is 406644257. The reversal of 406644256 is 652446604.

It can be written as a sum of positive squares in only one way, i.e., 387459856 + 19184400 = 19684^2 + 4380^2 .

It is not an unprimeable number, because it can be changed into a prime (406644253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6353785 + ... + 6353848.

Almost surely, 2^406644256 is an apocalyptic number.

It is an amenable number.

406644256 is a deficient number, since it is larger than the sum of its proper divisors (393936686).

406644256 is a wasteful number, since it uses less digits than its factorization.

406644256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12707643 (or 12707635 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 406644256 is about 20165.4222866768. The cubic root of 406644256 is about 740.8635256599.

The spelling of 406644256 in words is "four hundred six million, six hundred forty-four thousand, two hundred fifty-six".