28358725 has 12 divisors (see below), whose sum is σ = 35354880. Its totient is φ = 22564400.

The previous prime is 28358689. The next prime is 28358731. The reversal of 28358725 is 52785382.

It is not a de Polignac number, because 28358725 - 2⁷ = 28358597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1806 + ... + 7744.

It is an arithmetic number, because the mean of its divisors is an integer number (2946240).

Almost surely, 2^28358725 is an apocalyptic number.

28358725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28358725 is a deficient number, since it is larger than the sum of its proper divisors (6996155).

28358725 is a wasteful number, since it uses less digits than its factorization.

28358725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6140 (or 6135 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The square root of 28358725 is about 5325.2910718570. The cubic root of 28358725 is about 304.9501844646.

The spelling of 28358725 in words is "twenty-eight million, three hundred fifty-eight thousand, seven hundred twenty-five".