27855725 has 24 divisors (see below), whose sum is σ = 35735808. Its totient is φ = 21528000.

The previous prime is 27855703. The next prime is 27855727. The reversal of 27855725 is 52755872.

It is not a de Polignac number, because 27855725 - 2⁶ = 27855661 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27855727) 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, 177347 + ... + 177503.

It is an arithmetic number, because the mean of its divisors is an integer number (1488992).

Almost surely, 2^27855725 is an apocalyptic number.

27855725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27855725 is a deficient number, since it is larger than the sum of its proper divisors (7880083).

27855725 is a wasteful number, since it uses less digits than its factorization.

27855725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 360 counting only the distinct ones).

The product of its digits is 196000, while the sum is 41.

The square root of 27855725 is about 5277.8523094153. The cubic root of 27855725 is about 303.1364465866.

The spelling of 27855725 in words is "twenty-seven million, eight hundred fifty-five thousand, seven hundred twenty-five".