28561624 has 32 divisors (see below), whose sum is σ = 65913120. Its totient is φ = 11298816.

The previous prime is 28561609. The next prime is 28561627. The reversal of 28561624 is 42616582.

It is a self number, because there is not a number n which added to its sum of digits gives 28561624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28561627) 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 7 ways as a sum of consecutive naturals, for example, 18889 + ... + 20344.

It is an arithmetic number, because the mean of its divisors is an integer number (2059785).

Almost surely, 2^28561624 is an apocalyptic number.

It is an amenable number.

28561624 is an abundant number, since it is smaller than the sum of its proper divisors (37351496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28561624 is a wasteful number, since it uses less digits than its factorization.

28561624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39259 (or 39255 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 28561624 is about 5344.3076258763. The cubic root of 28561624 is about 305.6757355032.

The spelling of 28561624 in words is "twenty-eight million, five hundred sixty-one thousand, six hundred twenty-four".