28087344 has 80 divisors (see below), whose sum is σ = 81740800. Its totient is φ = 9232704.

The previous prime is 28087331. The next prime is 28087351. The reversal of 28087344 is 44378082.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28087299 and 28087308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33717 + ... + 34539.

It is an arithmetic number, because the mean of its divisors is an integer number (1021760).

Almost surely, 2^28087344 is an apocalyptic number.

28087344 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 28087344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40870400).

28087344 is an abundant number, since it is smaller than the sum of its proper divisors (53653456).

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

28087344 is a wasteful number, since it uses less digits than its factorization.

28087344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 28087344 is about 5299.7494280390. The cubic root of 28087344 is about 303.9743168515.

The spelling of 28087344 in words is "twenty-eight million, eighty-seven thousand, three hundred forty-four".