28383744 has 80 divisors (see below), whose sum is σ = 80137728. Its totient is φ = 8896512.

The previous prime is 28383743. The next prime is 28383763. The reversal of 28383744 is 44738382.

It is not an unprimeable number, because it can be changed into a prime (28383743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25569 + ... + 26655.

Almost surely, 2^28383744 is an apocalyptic number.

28383744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28383744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40068864).

28383744 is an abundant number, since it is smaller than the sum of its proper divisors (51753984).

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

28383744 is a wasteful number, since it uses less digits than its factorization.

28383744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125 (or 1109 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 28383744 is about 5327.6396274523. The cubic root of 28383744 is about 305.0398371328.

It can be divided in two parts, 283837 and 44, that added together give a triangular number (283881 = T₇₅₃).

The spelling of 28383744 in words is "twenty-eight million, three hundred eighty-three thousand, seven hundred forty-four".