28675140 has 96 divisors (see below), whose sum is σ = 87588480. Its totient is φ = 6967296.

The previous prime is 28675139. The next prime is 28675159. The reversal of 28675140 is 4157682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75471 + ... + 75849.

It is an arithmetic number, because the mean of its divisors is an integer number (912380).

Almost surely, 2^28675140 is an apocalyptic number.

28675140 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 28675140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43794240).

28675140 is an abundant number, since it is smaller than the sum of its proper divisors (58913340).

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

28675140 is a wasteful number, since it uses less digits than its factorization.

28675140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 28675140 is about 5354.9173663092. The cubic root of 28675140 is about 306.0801618341.

The spelling of 28675140 in words is "twenty-eight million, six hundred seventy-five thousand, one hundred forty".