28586725 has 6 divisors (see below), whose sum is σ = 35447570. Its totient is φ = 22869360.

The previous prime is 28586713. The next prime is 28586729. The reversal of 28586725 is 52768582.

It can be written as a sum of positive squares in 3 ways, for example, as 7214596 + 21372129 = 2686^2 + 4623^2 .

It is not a de Polignac number, because 28586725 - 2¹³ = 28578533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28586729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 571710 + ... + 571759.

Almost surely, 2^28586725 is an apocalyptic number.

28586725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28586725 is a deficient number, since it is larger than the sum of its proper divisors (6860845).

28586725 is a wasteful number, since it uses less digits than its factorization.

28586725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143479 (or 1143474 counting only the distinct ones).

The product of its digits is 268800, while the sum is 43.

The square root of 28586725 is about 5346.6554966633. The cubic root of 28586725 is about 305.7652556233.

The spelling of 28586725 in words is "twenty-eight million, five hundred eighty-six thousand, seven hundred twenty-five".