27987925 has 12 divisors (see below), whose sum is σ = 39663136. Its totient is φ = 19191600.

The previous prime is 27987913. The next prime is 27987937. The reversal of 27987925 is 52978972.

It is an interprime number because it is at equal distance from previous prime (27987913) and next prime (27987937).

It is a de Polignac number, because none of the positive numbers 2^k-27987925 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79791 + ... + 80140.

Almost surely, 2^27987925 is an apocalyptic number.

27987925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27987925 is a deficient number, since it is larger than the sum of its proper divisors (11675211).

27987925 is a wasteful number, since it uses less digits than its factorization.

27987925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159948 (or 159943 counting only the distinct ones).

The product of its digits is 635040, while the sum is 49.

The square root of 27987925 is about 5290.3615188378. The cubic root of 27987925 is about 303.6152399448.

The spelling of 27987925 in words is "twenty-seven million, nine hundred eighty-seven thousand, nine hundred twenty-five".