4390656 has 36 divisors (see below), whose sum is σ = 11687592. Its totient is φ = 1463296.

The previous prime is 4390651. The next prime is 4390657. The reversal of 4390656 is 6560934.

It is a happy number.

It is a super-2 number, since 2×4390656² = 38555720220672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4390651) 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, 2091 + ... + 3626.

Almost surely, 2^4390656 is an apocalyptic number.

It is an amenable number.

4390656 is an abundant number, since it is smaller than the sum of its proper divisors (7296936).

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

4390656 is an equidigital number, since it uses as much as digits as its factorization.

4390656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5736 (or 5722 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 4390656 is about 2095.3892239868. The cubic root of 4390656 is about 163.7481758824.

The spelling of 4390656 in words is "four million, three hundred ninety thousand, six hundred fifty-six".