27872505 has 20 divisors (see below), whose sum is σ = 49964772. Its totient is φ = 14865120.

The previous prime is 27872489. The next prime is 27872519. The reversal of 27872505 is 50527872.

It can be written as a sum of positive squares in 2 ways, for example, as 2832489 + 25040016 = 1683^2 + 5004^2 .

It is not a de Polignac number, because 27872505 - 2⁴ = 27872489 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 27872505.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34006 + ... + 34815.

Almost surely, 2^27872505 is an apocalyptic number.

It is an amenable number.

27872505 is a deficient number, since it is larger than the sum of its proper divisors (22092267).

27872505 is an equidigital number, since it uses as much as digits as its factorization.

27872505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68838 (or 68829 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 27872505 is about 5279.4417318501. The cubic root of 27872505 is about 303.1973031195.

The spelling of 27872505 in words is "twenty-seven million, eight hundred seventy-two thousand, five hundred five".