40644027 has 6 divisors (see below), whose sum is σ = 58708052. Its totient is φ = 27096012.

The previous prime is 40644001. The next prime is 40644031. The reversal of 40644027 is 72044604.

It is not a de Polignac number, because 40644027 - 2⁶ = 40643963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40644047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2257993 + ... + 2258010.

Almost surely, 2^40644027 is an apocalyptic number.

40644027 is a deficient number, since it is larger than the sum of its proper divisors (18064025).

40644027 is a wasteful number, since it uses less digits than its factorization.

40644027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516009 (or 4516006 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 40644027 is about 6375.2668179457. The cubic root of 40644027 is about 343.8208769773.

The spelling of 40644027 in words is "forty million, six hundred forty-four thousand, twenty-seven".