28256532 has 12 divisors (see below), whose sum is σ = 65931936. Its totient is φ = 9418840.

The previous prime is 28256507. The next prime is 28256549. The reversal of 28256532 is 23565282.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 28256493 and 28256502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1177344 + ... + 1177367.

It is an arithmetic number, because the mean of its divisors is an integer number (5494328).

Almost surely, 2^28256532 is an apocalyptic number.

It is an amenable number.

28256532 is an abundant number, since it is smaller than the sum of its proper divisors (37675404).

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

28256532 is a wasteful number, since it uses less digits than its factorization.

28256532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354718 (or 2354716 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 28256532 is about 5315.6873497225. The cubic root of 28256532 is about 304.5834392147.

The spelling of 28256532 in words is "twenty-eight million, two hundred fifty-six thousand, five hundred thirty-two".