28595520 has 84 divisors (see below), whose sum is σ = 98366580. Its totient is φ = 7624704.

The previous prime is 28595453. The next prime is 28595531. The reversal of 28595520 is 2559582.

It can be written as a sum of positive squares in 2 ways, for example, as 8020224 + 20575296 = 2832^2 + 4536^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2085 + ... + 7844.

Almost surely, 2^28595520 is an apocalyptic number.

28595520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28595520 is an abundant number, since it is smaller than the sum of its proper divisors (69771060).

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

28595520 is a wasteful number, since it uses less digits than its factorization.

28595520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9952 (or 9939 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 28595520 is about 5347.4779101928. The cubic root of 28595520 is about 305.7966096834.

The spelling of 28595520 in words is "twenty-eight million, five hundred ninety-five thousand, five hundred twenty".