27979025 has 24 divisors (see below), whose sum is σ = 37613664. Its totient is φ = 20563200.

The previous prime is 27978983. The next prime is 27979027. The reversal of 27979025 is 52097972.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-27979025 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27979027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17510 + ... + 19040.

It is an arithmetic number, because the mean of its divisors is an integer number (1567236).

Almost surely, 2^27979025 is an apocalyptic number.

27979025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27979025 is a deficient number, since it is larger than the sum of its proper divisors (9634639).

27979025 is a wasteful number, since it uses less digits than its factorization.

27979025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 27979025 is about 5289.5202996113. The cubic root of 27979025 is about 303.5830538965.

The spelling of 27979025 in words is "twenty-seven million, nine hundred seventy-nine thousand, twenty-five".