28113748 has 24 divisors (see below), whose sum is σ = 53132072. Its totient is φ = 12939264.

The previous prime is 28113739. The next prime is 28113781. The reversal of 28113748 is 84731182.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2022084 + 26091664 = 1422^2 + 5108^2 .

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, 29536 + ... + 30472.

Almost surely, 2^28113748 is an apocalyptic number.

It is an amenable number.

28113748 is a deficient number, since it is larger than the sum of its proper divisors (25018324).

28113748 is a wasteful number, since it uses less digits than its factorization.

28113748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1529 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 28113748 is about 5302.2399040406. The cubic root of 28113748 is about 304.0695391473.

The spelling of 28113748 in words is "twenty-eight million, one hundred thirteen thousand, seven hundred forty-eight".