28583620 has 24 divisors (see below), whose sum is σ = 64643544. Its totient is φ = 10553856.

The previous prime is 28583591. The next prime is 28583627. The reversal of 28583620 is 2638582.

It can be written as a sum of positive squares in 4 ways, for example, as 46656 + 28536964 = 216^2 + 5342^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28583627) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 54709 + ... + 55228.

It is an arithmetic number, because the mean of its divisors is an integer number (2693481).

Almost surely, 2^28583620 is an apocalyptic number.

28583620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28583620 is an abundant number, since it is smaller than the sum of its proper divisors (36059924).

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

28583620 is a wasteful number, since it uses less digits than its factorization.

28583620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109959 (or 109957 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28583620 is about 5346.3651203411. The cubic root of 28583620 is about 305.7541848029.

The spelling of 28583620 in words is "twenty-eight million, five hundred eighty-three thousand, six hundred twenty".