28928718 has 144 divisors (see below), whose sum is σ = 83406960. Its totient is φ = 7366464.

The previous prime is 28928717. The next prime is 28928729. The reversal of 28928718 is 81782982.

It is a happy number.

Its product of digits (129024) is a multiple of the sum of its prime factors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928717) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 997528 + ... + 997556.

It is an arithmetic number, because the mean of its divisors is an integer number (579215).

Almost surely, 2^28928718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28928718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41703480).

28928718 is an abundant number, since it is smaller than the sum of its proper divisors (54478242).

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

28928718 is a wasteful number, since it uses less digits than its factorization.

28928718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 54 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 28928718 is about 5378.5423675937. The cubic root of 28928718 is about 306.9797508811.

It can be divided in two parts, 28928 and 718, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 28928718 in words is "twenty-eight million, nine hundred twenty-eight thousand, seven hundred eighteen".