28548738 has 12 divisors (see below), whose sum is σ = 61855638. Its totient is φ = 9516240.

The previous prime is 28548733. The next prime is 28548769. The reversal of 28548738 is 83784582.

It can be written as a sum of positive squares in only one way, i.e., 28547649 + 1089 = 5343^2 + 33^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28548693 and 28548702.

It is not an unprimeable number, because it can be changed into a prime (28548733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 793003 + ... + 793038.

Almost surely, 2^28548738 is an apocalyptic number.

28548738 is an abundant number, since it is smaller than the sum of its proper divisors (33306900).

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

28548738 is a wasteful number, since it uses less digits than its factorization.

28548738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586049 (or 1586046 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 28548738 is about 5343.1019080680. The cubic root of 28548738 is about 305.6297585418.

The spelling of 28548738 in words is "twenty-eight million, five hundred forty-eight thousand, seven hundred thirty-eight".