42690656 has 24 divisors (see below), whose sum is σ = 84201264. Its totient is φ = 21306240.

The previous prime is 42690643. The next prime is 42690677. The reversal of 42690656 is 65609624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25526 + ... + 27146.

It is an arithmetic number, because the mean of its divisors is an integer number (3508386).

Almost surely, 2^42690656 is an apocalyptic number.

It is an amenable number.

42690656 is a deficient number, since it is larger than the sum of its proper divisors (41510608).

42690656 is a wasteful number, since it uses less digits than its factorization.

42690656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454 (or 2446 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 42690656 is about 6533.8086901898. The cubic root of 42690656 is about 349.4976630401.

The spelling of 42690656 in words is "forty-two million, six hundred ninety thousand, six hundred fifty-six".