40056657 has 4 divisors (see below), whose sum is σ = 53408880. Its totient is φ = 26704436.

The previous prime is 40056629. The next prime is 40056659. The reversal of 40056657 is 75665004.

40056657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40056657 - 2¹⁰ = 40055633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40056659) by changing a digit.

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, 6676107 + ... + 6676112.

It is an arithmetic number, because the mean of its divisors is an integer number (13352220).

Almost surely, 2^40056657 is an apocalyptic number.

It is an amenable number.

40056657 is a deficient number, since it is larger than the sum of its proper divisors (13352223).

40056657 is a wasteful number, since it uses less digits than its factorization.

40056657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13352222.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 40056657 is about 6329.0328645062. The cubic root of 40056657 is about 342.1565833372.

The spelling of 40056657 in words is "forty million, fifty-six thousand, six hundred fifty-seven".