40904957 has 4 divisors (see below), whose sum is σ = 40919580. Its totient is φ = 40890336.

The previous prime is 40904951. The next prime is 40904959. The reversal of 40904957 is 75940904.

40904957 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.

It can be written as a sum of positive squares in 2 ways, for example, as 28366276 + 12538681 = 5326^2 + 3541^2 .

It is a cyclic number.

It is not a de Polignac number, because 40904957 - 2¹⁸ = 40642813 is a prime.

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 40904957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40904951) 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, 1658 + ... + 9195.

It is an arithmetic number, because the mean of its divisors is an integer number (10229895).

Almost surely, 2^40904957 is an apocalyptic number.

It is an amenable number.

40904957 is a deficient number, since it is larger than the sum of its proper divisors (14623).

40904957 is a wasteful number, since it uses less digits than its factorization.

40904957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14622.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 40904957 is about 6395.6983199648. The cubic root of 40904957 is about 344.5550716185. Note that the first 3 decimals are identical.

The spelling of 40904957 in words is "forty million, nine hundred four thousand, nine hundred fifty-seven".