27920025 has 96 divisors (see below), whose sum is σ = 61900800. Its totient is φ = 12052800.

The previous prime is 27920017. The next prime is 27920059. The reversal of 27920025 is 52002972.

It is a happy number.

It is not a de Polignac number, because 27920025 - 2³ = 27920017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 89620 + ... + 89930.

It is an arithmetic number, because the mean of its divisors is an integer number (644800).

Almost surely, 2^27920025 is an apocalyptic number.

27920025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27920025 is an abundant number, since it is smaller than the sum of its proper divisors (33980775).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27920025 is a wasteful number, since it uses less digits than its factorization.

27920025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 27920025 is about 5283.9402911085. The cubic root of 27920025 is about 303.3695129195.

Adding to 27920025 its reverse (52002972), we get a palindrome (79922997).

The spelling of 27920025 in words is "twenty-seven million, nine hundred twenty thousand, twenty-five".