28260810 has 48 divisors (see below), whose sum is σ = 74229480. Its totient is φ = 7459200.

The previous prime is 28260787. The next prime is 28260811. The reversal of 28260810 is 1806282.

It can be written as a sum of positive squares in 4 ways, for example, as 25010001 + 3250809 = 5001^2 + 1803^2 .

It is a super-2 number, since 2×28260810² = 1597346763712200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28260811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7536 + ... + 10644.

Almost surely, 2^28260810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28260810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37114740).

28260810 is an abundant number, since it is smaller than the sum of its proper divisors (45968670).

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

28260810 is a wasteful number, since it uses less digits than its factorization.

28260810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223 (or 3220 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 28260810 is about 5316.0897283624. The cubic root of 28260810 is about 304.5988096100.

The spelling of 28260810 in words is "twenty-eight million, two hundred sixty thousand, eight hundred ten".