28880284 has 12 divisors (see below), whose sum is σ = 50768704. Its totient is φ = 14374944.

The previous prime is 28880261. The next prime is 28880287. The reversal of 28880284 is 48208882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28880287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15297 + ... + 17080.

Almost surely, 2^28880284 is an apocalyptic number.

It is an amenable number.

28880284 is a deficient number, since it is larger than the sum of its proper divisors (21888420).

28880284 is a wasteful number, since it uses less digits than its factorization.

28880284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32604 (or 32602 counting only the distinct ones).

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

The square root of 28880284 is about 5374.0379604167. The cubic root of 28880284 is about 306.8083345659.

The spelling of 28880284 in words is "twenty-eight million, eight hundred eighty thousand, two hundred eighty-four".