28813708 has 48 divisors (see below), whose sum is σ = 66576384. Its totient is φ = 10563840.

The previous prime is 28813627. The next prime is 28813723. The reversal of 28813708 is 80731882.

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, 2485 + ... + 7987.

It is an arithmetic number, because the mean of its divisors is an integer number (1387008).

Almost surely, 2^28813708 is an apocalyptic number.

28813708 is a gapful number since it is divisible by the number (28) 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 28813708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33288192).

28813708 is an abundant number, since it is smaller than the sum of its proper divisors (37762676).

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

28813708 is a wasteful number, since it uses less digits than its factorization.

28813708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5542 (or 5540 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 28813708 is about 5367.8401615547. The cubic root of 28813708 is about 306.5723975107.

The spelling of 28813708 in words is "twenty-eight million, eight hundred thirteen thousand, seven hundred eight".