40047165 has 12 divisors (see below), whose sum is σ = 69415164. Its totient is φ = 21358464.

The previous prime is 40047157. The next prime is 40047169. The reversal of 40047165 is 56174004.

It can be written as a sum of positive squares in 2 ways, for example, as 25826724 + 14220441 = 5082^2 + 3771^2 .

It is not a de Polignac number, because 40047165 - 2³ = 40047157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40047169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444924 + ... + 445013.

It is an arithmetic number, because the mean of its divisors is an integer number (5784597).

Almost surely, 2^40047165 is an apocalyptic number.

40047165 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40047165 is a deficient number, since it is larger than the sum of its proper divisors (29367999).

40047165 is a wasteful number, since it uses less digits than its factorization.

40047165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889948 (or 889945 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 40047165 is about 6328.2829424734. The cubic root of 40047165 is about 342.1295548971.

The spelling of 40047165 in words is "forty million, forty-seven thousand, one hundred sixty-five".