27728425 has 12 divisors (see below), whose sum is σ = 34569216. Its totient is φ = 22062800.

The previous prime is 27728417. The next prime is 27728431. The reversal of 27728425 is 52482772.

It is not a de Polignac number, because 27728425 - 2³ = 27728417 is a prime.

It is a Duffinian 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, 1872 + ... + 7678.

It is an arithmetic number, because the mean of its divisors is an integer number (2880768).

Almost surely, 2^27728425 is an apocalyptic number.

27728425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27728425 is a deficient number, since it is larger than the sum of its proper divisors (6840791).

27728425 is a wasteful number, since it uses less digits than its factorization.

27728425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008 (or 6003 counting only the distinct ones).

The product of its digits is 62720, while the sum is 37.

The square root of 27728425 is about 5265.7786698645. The cubic root of 27728425 is about 302.6739659132.

The spelling of 27728425 in words is "twenty-seven million, seven hundred twenty-eight thousand, four hundred twenty-five".