28183740 has 96 divisors (see below), whose sum is σ = 88736256. Its totient is φ = 6631680.

The previous prime is 28183723. The next prime is 28183759. The reversal of 28183740 is 4738182.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17155 + ... + 18725.

It is an arithmetic number, because the mean of its divisors is an integer number (924336).

Almost surely, 2^28183740 is an apocalyptic number.

28183740 is a gapful number since it is divisible by the number (20) 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 28183740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44368128).

28183740 is an abundant number, since it is smaller than the sum of its proper divisors (60552516).

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

28183740 is a wasteful number, since it uses less digits than its factorization.

28183740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619 (or 1617 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 28183740 is about 5308.8360306191. The cubic root of 28183740 is about 304.3216672518.

The spelling of 28183740 in words is "twenty-eight million, one hundred eighty-three thousand, seven hundred forty".