28753938 has 12 divisors (see below), whose sum is σ = 62300238. Its totient is φ = 9584640.

The previous prime is 28753937. The next prime is 28753961. The reversal of 28753938 is 83935782.

28753938 is a `hidden beast` number, since 2 + 87 + 539 + 38 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27594009 + 1159929 = 5253^2 + 1077^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28753893 and 28753902.

It is not an unprimeable number, because it can be changed into a prime (28753937) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 798703 + ... + 798738.

Almost surely, 2^28753938 is an apocalyptic number.

28753938 is an abundant number, since it is smaller than the sum of its proper divisors (33546300).

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

28753938 is a wasteful number, since it uses less digits than its factorization.

28753938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597449 (or 1597446 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28753938 is about 5362.2698552012. The cubic root of 28753938 is about 306.3602702726.

The spelling of 28753938 in words is "twenty-eight million, seven hundred fifty-three thousand, nine hundred thirty-eight".