28506576 has 80 divisors (see below), whose sum is σ = 86474624. Its totient is φ = 7921152.

The previous prime is 28506553. The next prime is 28506587. The reversal of 28506576 is 67560582.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11286 + ... + 13578.

Almost surely, 2^28506576 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 28506576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43237312).

28506576 is an abundant number, since it is smaller than the sum of its proper divisors (57968048).

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

28506576 is a wasteful number, since it uses less digits than its factorization.

28506576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348 (or 2342 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 28506576 is about 5339.1549893218. The cubic root of 28506576 is about 305.4792287052.

The spelling of 28506576 in words is "twenty-eight million, five hundred six thousand, five hundred seventy-six".