28817516 has 48 divisors (see below), whose sum is σ = 65733696. Its totient is φ = 10727424.

The previous prime is 28817501. The next prime is 28817521. The reversal of 28817516 is 61571882.

It is a self number, because there is not a number n which added to its sum of digits gives 28817516.

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, 3860 + ... + 8516.

It is an arithmetic number, because the mean of its divisors is an integer number (1369452).

Almost surely, 2^28817516 is an apocalyptic number.

28817516 is a gapful number since it is divisible by the number (26) 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 28817516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32866848).

28817516 is an abundant number, since it is smaller than the sum of its proper divisors (36916180).

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

28817516 is a wasteful number, since it uses less digits than its factorization.

28817516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4698 (or 4696 counting only the distinct ones).

The product of its digits is 26880, while the sum is 38.

The square root of 28817516 is about 5368.1948548837. The cubic root of 28817516 is about 306.5859023821.

The spelling of 28817516 in words is "twenty-eight million, eight hundred seventeen thousand, five hundred sixteen".