28130036 has 24 divisors (see below), whose sum is σ = 56863296. Its totient is φ = 12033920.

The previous prime is 28130033. The next prime is 28130093. The reversal of 28130036 is 63003182.

It is a super-2 number, since 2×28130036² = 1582597850722592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28129993 and 28130020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28130033) 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, 18056 + ... + 19551.

It is an arithmetic number, because the mean of its divisors is an integer number (2369304).

Almost surely, 2^28130036 is an apocalyptic number.

It is an amenable number.

28130036 is an abundant number, since it is smaller than the sum of its proper divisors (28733260).

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

28130036 is a wasteful number, since it uses less digits than its factorization.

28130036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37639 (or 37637 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 28130036 is about 5303.7756362803. The cubic root of 28130036 is about 304.1282497883.

The spelling of 28130036 in words is "twenty-eight million, one hundred thirty thousand, thirty-six".