28989744 has 120 divisors (see below), whose sum is σ = 90708480. Its totient is φ = 7814016.

The previous prime is 28989731. The next prime is 28989757. The reversal of 28989744 is 44798982.

It is an interprime number because it is at equal distance from previous prime (28989731) and next prime (28989757).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121177 + ... + 121415.

It is an arithmetic number, because the mean of its divisors is an integer number (755904).

Almost surely, 2^28989744 is an apocalyptic number.

28989744 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 28989744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45354240).

28989744 is an abundant number, since it is smaller than the sum of its proper divisors (61718736).

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

28989744 is a wasteful number, since it uses less digits than its factorization.

28989744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 270 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 28989744 is about 5384.2124772338. The cubic root of 28989744 is about 307.1954602736.

It can be divided in two parts, 289897 and 44, that added together give a triangular number (289941 = T₇₆₁).

The spelling of 28989744 in words is "twenty-eight million, nine hundred eighty-nine thousand, seven hundred forty-four".