28257575 has 12 divisors (see below), whose sum is σ = 35786400. Its totient is φ = 22124160.

The previous prime is 28257563. The next prime is 28257583. The reversal of 28257575 is 57575282.

It is not a de Polignac number, because 28257575 - 2⁸ = 28257319 is a prime.

28257575 is a modest number, since divided by 7575 gives 2825 as remainder.

It is a congruent 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, 10850 + ... + 13199.

It is an arithmetic number, because the mean of its divisors is an integer number (2982200).

Almost surely, 2^28257575 is an apocalyptic number.

28257575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28257575 is a deficient number, since it is larger than the sum of its proper divisors (7528825).

28257575 is a wasteful number, since it uses less digits than its factorization.

28257575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24106 (or 24101 counting only the distinct ones).

The product of its digits is 196000, while the sum is 41.

The square root of 28257575 is about 5315.7854546624. The cubic root of 28257575 is about 304.5871867449.

The spelling of 28257575 in words is "twenty-eight million, two hundred fifty-seven thousand, five hundred seventy-five".