28047860 has 24 divisors (see below), whose sum is σ = 59058720. Its totient is φ = 11189024.

The previous prime is 28047829. The next prime is 28047863. The reversal of 28047860 is 6874082.

It is a self number, because there is not a number n which added to its sum of digits gives 28047860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28047863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6707 + ... + 10053.

It is an arithmetic number, because the mean of its divisors is an integer number (2460780).

Almost surely, 2^28047860 is an apocalyptic number.

28047860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28047860 is an abundant number, since it is smaller than the sum of its proper divisors (31010860).

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

28047860 is a wasteful number, since it uses less digits than its factorization.

28047860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3775 (or 3773 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 28047860 is about 5296.0230362037. The cubic root of 28047860 is about 303.8318119764.

Subtracting from 28047860 its reverse (6874082), we obtain a triangular number (21173778 = T₆₅₀₇).

The spelling of 28047860 in words is "twenty-eight million, forty-seven thousand, eight hundred sixty".