27928525 has 24 divisors (see below), whose sum is σ = 36023240. Its totient is φ = 21461760.

The previous prime is 27928517. The next prime is 27928529. The reversal of 27928525 is 52582972.

It can be written as a sum of positive squares in 12 ways, for example, as 3928324 + 24000201 = 1982^2 + 4899^2 .

It is not a de Polignac number, because 27928525 - 2³ = 27928517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27928529) 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, 100687 + ... + 100963.

Almost surely, 2^27928525 is an apocalyptic number.

27928525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27928525 is a deficient number, since it is larger than the sum of its proper divisors (8094715).

27928525 is a wasteful number, since it uses less digits than its factorization.

27928525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 428 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 27928525 is about 5284.7445539023. The cubic root of 27928525 is about 303.4002958339.

The spelling of 27928525 in words is "twenty-seven million, nine hundred twenty-eight thousand, five hundred twenty-five".