28085130 has 40 divisors (see below), whose sum is σ = 75519972. Its totient is φ = 7489152.

The previous prime is 28085119. The next prime is 28085153. The reversal of 28085130 is 3158082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25130169 + 2954961 = 5013^2 + 1719^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 28085094 and 28085103.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16527 + ... + 18146.

Almost surely, 2^28085130 is an apocalyptic number.

28085130 is an abundant number, since it is smaller than the sum of its proper divisors (47434842).

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

28085130 is a wasteful number, since it uses less digits than its factorization.

28085130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34692 (or 34683 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 28085130 is about 5299.5405461228. The cubic root of 28085130 is about 303.9663296619.

The spelling of 28085130 in words is "twenty-eight million, eighty-five thousand, one hundred thirty".