28038144 has 44 divisors (see below), whose sum is σ = 74740064. Its totient is φ = 9345024.

The previous prime is 28038089. The next prime is 28038163. The reversal of 28038144 is 44183082.

It is a super-2 number, since 2×28038144² = 1572275037929472, which contains 22 as substring.

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, 1492 + ... + 7635.

Almost surely, 2^28038144 is an apocalyptic number.

28038144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28038144 is an abundant number, since it is smaller than the sum of its proper divisors (46701920).

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

28038144 is an equidigital number, since it uses as much as digits as its factorization.

28038144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9150 (or 9132 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 28038144 is about 5295.1056646681. The cubic root of 28038144 is about 303.7967246789.

It can be divided in two parts, 28038 and 144, that added together give a palindrome (28182).

The spelling of 28038144 in words is "twenty-eight million, thirty-eight thousand, one hundred forty-four".