28656750 has 64 divisors (see below), whose sum is σ = 75329280. Its totient is φ = 7236000.

The previous prime is 28656737. The next prime is 28656751. The reversal of 28656750 is 5765682.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28656699 and 28656708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28656751) 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 31 ways as a sum of consecutive naturals, for example, 13245 + ... + 15255.

It is an arithmetic number, because the mean of its divisors is an integer number (1177020).

Almost surely, 2^28656750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28656750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37664640).

28656750 is an abundant number, since it is smaller than the sum of its proper divisors (46672530).

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

28656750 is a wasteful number, since it uses less digits than its factorization.

28656750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050 (or 2040 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 28656750 is about 5353.1999775835. The cubic root of 28656750 is about 306.0147158543.

The spelling of 28656750 in words is "twenty-eight million, six hundred fifty-six thousand, seven hundred fifty".