28678524 has 144 divisors (see below), whose sum is σ = 87333120. Its totient is φ = 7257600.

The previous prime is 28678519. The next prime is 28678537. The reversal of 28678524 is 42587682.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189849 + ... + 189999.

It is an arithmetic number, because the mean of its divisors is an integer number (606480).

Almost surely, 2^28678524 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28678524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43666560).

28678524 is an abundant number, since it is smaller than the sum of its proper divisors (58654596).

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

28678524 is a wasteful number, since it uses less digits than its factorization.

28678524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 199 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 28678524 is about 5355.2333282500. The cubic root of 28678524 is about 306.0922017000.

The spelling of 28678524 in words is "twenty-eight million, six hundred seventy-eight thousand, five hundred twenty-four".