28251936 has 96 divisors (see below), whose sum is σ = 86788800. Its totient is φ = 8916480.

The previous prime is 28251907. The next prime is 28251953. The reversal of 28251936 is 63915282.

It is a tau number, because it is divible by the number of its divisors (96).

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 28251936.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15556 + ... + 17276.

It is an arithmetic number, because the mean of its divisors is an integer number (904050).

Almost surely, 2^28251936 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 28251936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43394400).

28251936 is an abundant number, since it is smaller than the sum of its proper divisors (58536864).

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

28251936 is a wasteful number, since it uses less digits than its factorization.

28251936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759 (or 1745 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28251936 is about 5315.2550268073. The cubic root of 28251936 is about 304.5669245507.

It can be divided in two parts, 2825 and 1936, that added together give a square (4761 = 69²).

The spelling of 28251936 in words is "twenty-eight million, two hundred fifty-one thousand, nine hundred thirty-six".