40879521 has 12 divisors (see below), whose sum is σ = 59193940. Its totient is φ = 27185760.

The previous prime is 40879511. The next prime is 40879529. The reversal of 40879521 is 12597804.

It can be written as a sum of positive squares in 2 ways, for example, as 6305121 + 34574400 = 2511^2 + 5880^2 .

It is not a de Polignac number, because 40879521 - 2¹⁵ = 40846753 is a prime.

It is a super-2 number, since 2×40879521² = 3342270474378882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40879529) 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, 1606 + ... + 9183.

Almost surely, 2^40879521 is an apocalyptic number.

It is an amenable number.

40879521 is a deficient number, since it is larger than the sum of its proper divisors (18314419).

40879521 is a wasteful number, since it uses less digits than its factorization.

40879521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11216 (or 11213 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 40879521 is about 6393.7094866752. The cubic root of 40879521 is about 344.4836383850.

The spelling of 40879521 in words is "forty million, eight hundred seventy-nine thousand, five hundred twenty-one".