28000756 has 72 divisors (see below), whose sum is σ = 61414080. Its totient is φ = 11104128.

The previous prime is 28000741. The next prime is 28000757. The reversal of 28000756 is 65700082.

It is a Harshad number since it is a multiple of its sum of digits (28).

28000756 is a modest number, since divided by 756 gives 28 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271801 + ... + 271903.

Almost surely, 2^28000756 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 28000756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30707040).

28000756 is an abundant number, since it is smaller than the sum of its proper divisors (33413324).

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

28000756 is a wasteful number, since it uses less digits than its factorization.

28000756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28000756 is about 5291.5740569324. The cubic root of 28000756 is about 303.6616300930.

The spelling of 28000756 in words is "twenty-eight million, seven hundred fifty-six", and thus it is an aban number.