40857656 has 16 divisors (see below), whose sum is σ = 87552240. Its totient is φ = 17510400.

The previous prime is 40857643. The next prime is 40857667. The reversal of 40857656 is 65675804.

40857656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364745 + ... + 364856.

It is an arithmetic number, because the mean of its divisors is an integer number (5472015).

Almost surely, 2^40857656 is an apocalyptic number.

It is an amenable number.

40857656 is an abundant number, since it is smaller than the sum of its proper divisors (46694584).

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

40857656 is a wasteful number, since it uses less digits than its factorization.

40857656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729614 (or 729610 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 40857656 is about 6391.9993742177. Note that the first 3 decimals coincide. The cubic root of 40857656 is about 344.4222100883.

The spelling of 40857656 in words is "forty million, eight hundred fifty-seven thousand, six hundred fifty-six".