28174525 has 12 divisors (see below), whose sum is σ = 36992052. Its totient is φ = 21213440.

The previous prime is 28174519. The next prime is 28174529. The reversal of 28174525 is 52547182.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 737881 + 27436644 = 859^2 + 5238^2 .

It is not a de Polignac number, because 28174525 - 2⁵ = 28174493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28174529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32722 + ... + 33571.

It is an arithmetic number, because the mean of its divisors is an integer number (3082671).

Almost surely, 2^28174525 is an apocalyptic number.

28174525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28174525 is a deficient number, since it is larger than the sum of its proper divisors (8817527).

28174525 is a wasteful number, since it uses less digits than its factorization.

28174525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66320 (or 66315 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 28174525 is about 5307.9680669725. The cubic root of 28174525 is about 304.2884964726.

The spelling of 28174525 in words is "twenty-eight million, one hundred seventy-four thousand, five hundred twenty-five".