28288572 has 96 divisors (see below), whose sum is σ = 75969600. Its totient is φ = 8176896.

The previous prime is 28288571. The next prime is 28288573. The reversal of 28288572 is 27588282.

It is an interprime number because it is at equal distance from previous prime (28288571) and next prime (28288573).

Its product of digits (143360) is a multiple of the sum of its prime factors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28288571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 764538 + ... + 764574.

It is an arithmetic number, because the mean of its divisors is an integer number (791350).

Almost surely, 2^28288572 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 28288572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37984800).

28288572 is an abundant number, since it is smaller than the sum of its proper divisors (47681028).

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

28288572 is a wasteful number, since it uses less digits than its factorization.

28288572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 84 counting only the distinct ones).

The product of its digits is 143360, while the sum is 42.

The square root of 28288572 is about 5318.7002171583. The cubic root of 28288572 is about 304.6985178238.

The spelling of 28288572 in words is "twenty-eight million, two hundred eighty-eight thousand, five hundred seventy-two".