27797825 has 24 divisors (see below), whose sum is σ = 37842816. Its totient is φ = 20088000.

The previous prime is 27797753. The next prime is 27797827. The reversal of 27797825 is 52879772.

It is a de Polignac number, because none of the positive numbers 2^k-27797825 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27797825.

It is not an unprimeable number, because it can be changed into a prime (27797827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74339 + ... + 74711.

It is an arithmetic number, because the mean of its divisors is an integer number (1576784).

Almost surely, 2^27797825 is an apocalyptic number.

27797825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27797825 is a deficient number, since it is larger than the sum of its proper divisors (10044991).

27797825 is a wasteful number, since it uses less digits than its factorization.

27797825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 660 counting only the distinct ones).

The product of its digits is 493920, while the sum is 47.

The square root of 27797825 is about 5272.3642704199. The cubic root of 27797825 is about 302.9262710595.

The spelling of 27797825 in words is "twenty-seven million, seven hundred ninety-seven thousand, eight hundred twenty-five".