28090584 has 64 divisors (see below), whose sum is σ = 79718400. Its totient is φ = 9160992.

The previous prime is 28090577. The next prime is 28090591. The reversal of 28090584 is 48509082.

It is an interprime number because it is at equal distance from previous prime (28090577) and next prime (28090591).

It is a super-2 number, since 2×28090584² = 1578161818922112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 15 ways as a sum of consecutive naturals, for example, 8769 + ... + 11535.

It is an arithmetic number, because the mean of its divisors is an integer number (1245600).

Almost surely, 2^28090584 is an apocalyptic number.

28090584 is a gapful number since it is divisible by the number (24) 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 28090584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39859200).

28090584 is an abundant number, since it is smaller than the sum of its proper divisors (51627816).

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

28090584 is a wasteful number, since it uses less digits than its factorization.

28090584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829 (or 2819 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28090584 is about 5300.0550940533. The cubic root of 28090584 is about 303.9860046650.

The spelling of 28090584 in words is "twenty-eight million, ninety thousand, five hundred eighty-four".