28858132 has 24 divisors (see below), whose sum is σ = 52554600. Its totient is φ = 13848576.

The previous prime is 28858111. The next prime is 28858133. The reversal of 28858132 is 23185882.

It can be written as a sum of positive squares in 4 ways, for example, as 5180176 + 23677956 = 2276^2 + 4866^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28858091 and 28858100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28858133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21744 + ... + 23032.

It is an arithmetic number, because the mean of its divisors is an integer number (2189775).

Almost surely, 2^28858132 is an apocalyptic number.

It is an amenable number.

28858132 is a deficient number, since it is larger than the sum of its proper divisors (23696468).

28858132 is a wasteful number, since it uses less digits than its factorization.

28858132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1513 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 28858132 is about 5371.9765449972. The cubic root of 28858132 is about 306.7298709256.

The spelling of 28858132 in words is "twenty-eight million, eight hundred fifty-eight thousand, one hundred thirty-two".