28299028 has 6 divisors (see below), whose sum is σ = 49523306. Its totient is φ = 14149512.

The previous prime is 28299017. The next prime is 28299053. The reversal of 28299028 is 82099282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28005264 + 293764 = 5292^2 + 542^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3537375 + ... + 3537382.

Almost surely, 2^28299028 is an apocalyptic number.

It is an amenable number.

28299028 is a deficient number, since it is larger than the sum of its proper divisors (21224278).

28299028 is a wasteful number, since it uses less digits than its factorization.

28299028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074761 (or 7074759 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 28299028 is about 5319.6830732667. The cubic root of 28299028 is about 304.7360540093.

The spelling of 28299028 in words is "twenty-eight million, two hundred ninety-nine thousand, twenty-eight".