28435725 has 48 divisors (see below), whose sum is σ = 52873600. Its totient is φ = 14981760.

The previous prime is 28435709. The next prime is 28435739. The reversal of 28435725 is 52753482.

28435725 is a `hidden beast` number, since 2 + 84 + 3 + 572 + 5 = 666.

It is not a de Polignac number, because 28435725 - 2⁴ = 28435709 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28435725.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 69321 + ... + 69729.

Almost surely, 2^28435725 is an apocalyptic number.

28435725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28435725 is a deficient number, since it is larger than the sum of its proper divisors (24437875).

28435725 is a wasteful number, since it uses less digits than its factorization.

28435725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 520 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 28435725 is about 5332.5158227613. The cubic root of 28435725 is about 305.2259366841.

The spelling of 28435725 in words is "twenty-eight million, four hundred thirty-five thousand, seven hundred twenty-five".