28881576 has 32 divisors (see below), whose sum is σ = 80227200. Its totient is φ = 9627120.

The previous prime is 28881569. The next prime is 28881617. The reversal of 28881576 is 67518882.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66640 + ... + 67071.

It is an arithmetic number, because the mean of its divisors is an integer number (2507100).

Almost surely, 2^28881576 is an apocalyptic number.

It is an amenable number.

28881576 is an abundant number, since it is smaller than the sum of its proper divisors (51345624).

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

28881576 is a wasteful number, since it uses less digits than its factorization.

28881576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133726 (or 133716 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 28881576 is about 5374.1581666341. The cubic root of 28881576 is about 306.8129096647.

The spelling of 28881576 in words is "twenty-eight million, eight hundred eighty-one thousand, five hundred seventy-six".