28625575 has 18 divisors (see below), whose sum is σ = 39020072. Its totient is φ = 20816400.

The previous prime is 28625557. The next prime is 28625579. The reversal of 28625575 is 57552682.

It is not a de Polignac number, because 28625575 - 2⁷ = 28625447 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 (28625579) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1707 + ... + 7756.

Almost surely, 2^28625575 is an apocalyptic number.

28625575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28625575 is a deficient number, since it is larger than the sum of its proper divisors (10394497).

28625575 is a wasteful number, since it uses less digits than its factorization.

28625575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9495 (or 9479 counting only the distinct ones).

The product of its digits is 168000, while the sum is 40.

The square root of 28625575 is about 5350.2873754594. The cubic root of 28625575 is about 305.9037068679.

The spelling of 28625575 in words is "twenty-eight million, six hundred twenty-five thousand, five hundred seventy-five".