27990495 has 64 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 13409280.

The previous prime is 27990493. The next prime is 27990503. The reversal of 27990495 is 59409972.

27990495 is a `hidden beast` number, since 2 + 79 + 90 + 495 = 666.

It is not a de Polignac number, because 27990495 - 2¹ = 27990493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 27990495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27990493) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71761 + ... + 72149.

It is an arithmetic number, because the mean of its divisors is an integer number (859950).

Almost surely, 2^27990495 is an apocalyptic number.

27990495 is a deficient number, since it is larger than the sum of its proper divisors (27046305).

27990495 is a wasteful number, since it uses less digits than its factorization.

27990495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 27990495 is about 5290.6044078158. The cubic root of 27990495 is about 303.6245328486.

The spelling of 27990495 in words is "twenty-seven million, nine hundred ninety thousand, four hundred ninety-five".