28558532 has 12 divisors (see below), whose sum is σ = 50313900. Its totient is φ = 14183136.

The previous prime is 28558531. The next prime is 28558547. The reversal of 28558532 is 23585582.

It can be written as a sum of positive squares in 2 ways, for example, as 3297856 + 25260676 = 1816^2 + 5026^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28558531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23363 + ... + 24554.

It is an arithmetic number, because the mean of its divisors is an integer number (4192825).

Almost surely, 2^28558532 is an apocalyptic number.

It is an amenable number.

28558532 is a deficient number, since it is larger than the sum of its proper divisors (21755368).

28558532 is a wasteful number, since it uses less digits than its factorization.

28558532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48070 (or 48068 counting only the distinct ones).

The product of its digits is 96000, while the sum is 38.

The square root of 28558532 is about 5344.0183382919. The cubic root of 28558532 is about 305.6647045772.

The spelling of 28558532 in words is "twenty-eight million, five hundred fifty-eight thousand, five hundred thirty-two".