28521486 has 48 divisors (see below), whose sum is σ = 72360288. Its totient is φ = 7948800.

The previous prime is 28521443. The next prime is 28521497. The reversal of 28521486 is 68412582.

It is a self number, because there is not a number n which added to its sum of digits gives 28521486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2406 + ... + 7926.

It is an arithmetic number, because the mean of its divisors is an integer number (1507506).

Almost surely, 2^28521486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28521486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36180144).

28521486 is an abundant number, since it is smaller than the sum of its proper divisors (43838802).

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

28521486 is a wasteful number, since it uses less digits than its factorization.

28521486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577 (or 5574 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 28521486 is about 5340.5510951586. The cubic root of 28521486 is about 305.5324784237.

The spelling of 28521486 in words is "twenty-eight million, five hundred twenty-one thousand, four hundred eighty-six".