40872013 has 32 divisors (see below), whose sum is σ = 52774400. Its totient is φ = 30792960.

The previous prime is 40872011. The next prime is 40872019. The reversal of 40872013 is 31027804.

It is a cyclic number.

It is not a de Polignac number, because 40872013 - 2¹ = 40872011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40872011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205288 + ... + 205486.

It is an arithmetic number, because the mean of its divisors is an integer number (1649200).

Almost surely, 2^40872013 is an apocalyptic number.

It is an amenable number.

40872013 is a deficient number, since it is larger than the sum of its proper divisors (11902387).

40872013 is a wasteful number, since it uses less digits than its factorization.

40872013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 40872013 is about 6393.1223201187. The cubic root of 40872013 is about 344.4625476168.

Adding to 40872013 its reverse (31027804), we get a palindrome (71899817).

The spelling of 40872013 in words is "forty million, eight hundred seventy-two thousand, thirteen".