40864645 has 16 divisors (see below), whose sum is σ = 50062320. Its totient is φ = 32016384.

The previous prime is 40864627. The next prime is 40864661. The reversal of 40864645 is 54646804.

It can be written as a sum of positive squares in 8 ways, for example, as 2709316 + 38155329 = 1646^2 + 6177^2 .

It is a cyclic number.

It is not a de Polignac number, because 40864645 - 2⁷ = 40864517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52479 + ... + 53251.

It is an arithmetic number, because the mean of its divisors is an integer number (3128895).

Almost surely, 2^40864645 is an apocalyptic number.

It is an amenable number.

40864645 is a deficient number, since it is larger than the sum of its proper divisors (9197675).

40864645 is a wasteful number, since it uses less digits than its factorization.

40864645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 40864645 is about 6392.5460498928. The cubic root of 40864645 is about 344.4418476121.

The spelling of 40864645 in words is "forty million, eight hundred sixty-four thousand, six hundred forty-five".