28036764 has 72 divisors (see below), whose sum is σ = 82188288. Its totient is φ = 7892640.

The previous prime is 28036733. The next prime is 28036777. The reversal of 28036764 is 46763082.

It is a super-3 number, since 3×28036764³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17109 + ... + 18675.

It is an arithmetic number, because the mean of its divisors is an integer number (1141504).

Almost surely, 2^28036764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28036764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41094144).

28036764 is an abundant number, since it is smaller than the sum of its proper divisors (54151524).

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

28036764 is a wasteful number, since it uses less digits than its factorization.

28036764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655 (or 1650 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 28036764 is about 5294.9753540503. The cubic root of 28036764 is about 303.7917404408.

The spelling of 28036764 in words is "twenty-eight million, thirty-six thousand, seven hundred sixty-four".