42857656 has 8 divisors (see below), whose sum is σ = 80358120. Its totient is φ = 21428824.

The previous prime is 42857653. The next prime is 42857657. The reversal of 42857656 is 65675824.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42857651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2678596 + ... + 2678611.

It is an arithmetic number, because the mean of its divisors is an integer number (10044765).

Almost surely, 2^42857656 is an apocalyptic number.

It is an amenable number.

42857656 is a deficient number, since it is larger than the sum of its proper divisors (37500464).

42857656 is a wasteful number, since it uses less digits than its factorization.

42857656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357213 (or 5357209 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The square root of 42857656 is about 6546.5758988955. The cubic root of 42857656 is about 349.9527990770.

The spelling of 42857656 in words is "forty-two million, eight hundred fifty-seven thousand, six hundred fifty-six".