28884028 has 24 divisors (see below), whose sum is σ = 53398800. Its totient is φ = 13632768.

The previous prime is 28884017. The next prime is 28884073. The reversal of 28884028 is 82048882.

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 7 ways as a sum of consecutive naturals, for example, 29076 + ... + 30052.

It is an arithmetic number, because the mean of its divisors is an integer number (2224950).

Almost surely, 2^28884028 is an apocalyptic number.

It is an amenable number.

28884028 is a deficient number, since it is larger than the sum of its proper divisors (24514772).

28884028 is a wasteful number, since it uses less digits than its factorization.

28884028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 40.

The square root of 28884028 is about 5374.3862905452. The cubic root of 28884028 is about 306.8215920622.

The spelling of 28884028 in words is "twenty-eight million, eight hundred eighty-four thousand, twenty-eight".