28113488 has 60 divisors (see below), whose sum is σ = 60791868. Its totient is φ = 12579840.

The previous prime is 28113457. The next prime is 28113523. The reversal of 28113488 is 88431182.

It can be written as a sum of positive squares in 6 ways, for example, as 150544 + 27962944 = 388^2 + 5288^2 .

It is a super-2 number, since 2×28113488² = 1580736415052288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 99908 + ... + 100188.

Almost surely, 2^28113488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28113488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30395934).

28113488 is an abundant number, since it is smaller than the sum of its proper divisors (32678380).

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

28113488 is a wasteful number, since it uses less digits than its factorization.

28113488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 333 counting only the distinct ones).

The product of its digits is 12288, while the sum is 35.

The square root of 28113488 is about 5302.2153860438. The cubic root of 28113488 is about 304.0686017847.

The spelling of 28113488 in words is "twenty-eight million, one hundred thirteen thousand, four hundred eighty-eight".