40808657 has 4 divisors (see below), whose sum is σ = 40841280. Its totient is φ = 40776036.

The previous prime is 40808641. The next prime is 40808671. The reversal of 40808657 is 75680804.

40808657 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 40808657 - 2⁴ = 40808641 is a prime.

It is a super-2 number, since 2×40808657² = 3330692972287298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40808657.

It is not an unprimeable number, because it can be changed into a prime (40868657) 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, 14357 + ... + 16962.

It is an arithmetic number, because the mean of its divisors is an integer number (10210320).

Almost surely, 2^40808657 is an apocalyptic number.

It is an amenable number.

40808657 is a deficient number, since it is larger than the sum of its proper divisors (32623).

40808657 is a wasteful number, since it uses less digits than its factorization.

40808657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32622.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 40808657 is about 6388.1653860870. The cubic root of 40808657 is about 344.2844709519.

The spelling of 40808657 in words is "forty million, eight hundred eight thousand, six hundred fifty-seven".