40442656 has 24 divisors (see below), whose sum is σ = 79799580. Its totient is φ = 20176128.

The previous prime is 40442653. The next prime is 40442669. The reversal of 40442656 is 65624404.

It can be written as a sum of positive squares in 2 ways, for example, as 30074256 + 10368400 = 5484^2 + 3220^2 .

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (40442653) 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, 16690 + ... + 18958.

Almost surely, 2^40442656 is an apocalyptic number.

It is an amenable number.

40442656 is a deficient number, since it is larger than the sum of its proper divisors (39356924).

40442656 is a wasteful number, since it uses less digits than its factorization.

40442656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836 (or 2828 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 40442656 is about 6359.4540646191. The cubic root of 40442656 is about 343.2521159783.

The spelling of 40442656 in words is "forty million, four hundred forty-two thousand, six hundred fifty-six".