28364525 has 24 divisors (see below), whose sum is σ = 40592640. Its totient is φ = 19258560.

The previous prime is 28364521. The next prime is 28364591. The reversal of 28364525 is 52546382.

It is not a de Polignac number, because 28364525 - 2² = 28364521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28364521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18332 + ... + 19818.

It is an arithmetic number, because the mean of its divisors is an integer number (1691360).

Almost surely, 2^28364525 is an apocalyptic number.

28364525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28364525 is a deficient number, since it is larger than the sum of its proper divisors (12228115).

28364525 is a wasteful number, since it uses less digits than its factorization.

28364525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613 (or 1608 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 28364525 is about 5325.8356151875. The cubic root of 28364525 is about 304.9709727817.

The spelling of 28364525 in words is "twenty-eight million, three hundred sixty-four thousand, five hundred twenty-five".