28751316 has 48 divisors (see below), whose sum is σ = 73758720. Its totient is φ = 8644320.

The previous prime is 28751309. The next prime is 28751323. The reversal of 28751316 is 61315782.

It is an interprime number because it is at equal distance from previous prime (28751309) and next prime (28751323).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 17565 + ... + 19131.

It is an arithmetic number, because the mean of its divisors is an integer number (1536640).

Almost surely, 2^28751316 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 28751316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36879360).

28751316 is an abundant number, since it is smaller than the sum of its proper divisors (45007404).

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

28751316 is a wasteful number, since it uses less digits than its factorization.

28751316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724 (or 1722 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 28751316 is about 5362.0253636103. The cubic root of 28751316 is about 306.3509579128.

The spelling of 28751316 in words is "twenty-eight million, seven hundred fifty-one thousand, three hundred sixteen".