28837328 has 20 divisors (see below), whose sum is σ = 60170628. Its totient is φ = 13309440.

The previous prime is 28837313. The next prime is 28837349. The reversal of 28837328 is 82373882.

It can be written as a sum of positive squares in 2 ways, for example, as 3717184 + 25120144 = 1928^2 + 5012^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69113 + ... + 69528.

Almost surely, 2^28837328 is an apocalyptic number.

It is an amenable number.

28837328 is an abundant number, since it is smaller than the sum of its proper divisors (31333300).

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

28837328 is a wasteful number, since it uses less digits than its factorization.

28837328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138662 (or 138656 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 28837328 is about 5370.0398508763. The cubic root of 28837328 is about 306.6561454067.

The spelling of 28837328 in words is "twenty-eight million, eight hundred thirty-seven thousand, three hundred twenty-eight".