28012575 has 12 divisors (see below), whose sum is σ = 46314248. Its totient is φ = 14940000.

The previous prime is 28012559. The next prime is 28012577. The reversal of 28012575 is 57521082.

It is not a de Polignac number, because 28012575 - 2⁴ = 28012559 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 (28012577) 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, 186676 + ... + 186825.

Almost surely, 2^28012575 is an apocalyptic number.

28012575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28012575 is a deficient number, since it is larger than the sum of its proper divisors (18301673).

28012575 is a wasteful number, since it uses less digits than its factorization.

28012575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373514 (or 373509 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 28012575 is about 5292.6907145610. The cubic root of 28012575 is about 303.7043488439.

The spelling of 28012575 in words is "twenty-eight million, twelve thousand, five hundred seventy-five".