28015308 has 30 divisors (see below), whose sum is σ = 73238396. Its totient is φ = 9338328.

The previous prime is 28015297. The next prime is 28015319. The reversal of 28015308 is 80351082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28015297) and next prime (28015319).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 42910 + ... + 43557.

Almost surely, 2^28015308 is an apocalyptic number.

It is an amenable number.

28015308 is an abundant number, since it is smaller than the sum of its proper divisors (45223088).

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

28015308 is a wasteful number, since it uses less digits than its factorization.

28015308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86483 (or 86472 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 28015308 is about 5292.9488945200. The cubic root of 28015308 is about 303.7142253249.

The spelling of 28015308 in words is "twenty-eight million, fifteen thousand, three hundred eight".