28100585 has 8 divisors (see below), whose sum is σ = 33758856. Its totient is φ = 22455040.

The previous prime is 28100581. The next prime is 28100599. The reversal of 28100585 is 58500182.

It can be written as a sum of positive squares in 4 ways, for example, as 8271376 + 19829209 = 2876^2 + 4453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28100585 - 2² = 28100581 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28100581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2657 + ... + 7953.

It is an arithmetic number, because the mean of its divisors is an integer number (4219857).

Almost surely, 2^28100585 is an apocalyptic number.

It is an amenable number.

28100585 is a deficient number, since it is larger than the sum of its proper divisors (5658271).

28100585 is a wasteful number, since it uses less digits than its factorization.

28100585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6363.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 28100585 is about 5300.9984908506. The cubic root of 28100585 is about 304.0220761034.

The spelling of 28100585 in words is "twenty-eight million, one hundred thousand, five hundred eighty-five".