28277136 has 60 divisors (see below), whose sum is σ = 79794000. Its totient is φ = 9347520.

The previous prime is 28277089. The next prime is 28277141. The reversal of 28277136 is 63177282.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28277136.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18115 + ... + 19613.

It is an arithmetic number, because the mean of its divisors is an integer number (1329900).

Almost surely, 2^28277136 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 28277136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39897000).

28277136 is an abundant number, since it is smaller than the sum of its proper divisors (51516864).

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

28277136 is a wasteful number, since it uses less digits than its factorization.

28277136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1635 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 28277136 is about 5317.6250337909. The cubic root of 28277136 is about 304.6574529265.

The spelling of 28277136 in words is "twenty-eight million, two hundred seventy-seven thousand, one hundred thirty-six".