28515344 has 80 divisors (see below), whose sum is σ = 66079104. Its totient is φ = 11848320.

The previous prime is 28515269. The next prime is 28515353. The reversal of 28515344 is 44351582.

It is a self number, because there is not a number n which added to its sum of digits gives 28515344.

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, 276797 + ... + 276899.

Almost surely, 2^28515344 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 28515344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33039552).

28515344 is an abundant number, since it is smaller than the sum of its proper divisors (37563760).

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

28515344 is a wasteful number, since it uses less digits than its factorization.

28515344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 129 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 28515344 is about 5339.9760299087. The cubic root of 28515344 is about 305.5105450737.

The spelling of 28515344 in words is "twenty-eight million, five hundred fifteen thousand, three hundred forty-four".