28198782 has 24 divisors (see below), whose sum is σ = 63754704. Its totient is φ = 8990784.

The previous prime is 28198769. The next prime is 28198783. The reversal of 28198782 is 28789182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28198783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33643 + ... + 34470.

It is an arithmetic number, because the mean of its divisors is an integer number (2656446).

Almost surely, 2^28198782 is an apocalyptic number.

28198782 is an abundant number, since it is smaller than the sum of its proper divisors (35555922).

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

28198782 is a wasteful number, since it uses less digits than its factorization.

28198782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68144 (or 68141 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 28198782 is about 5310.2525363677. The cubic root of 28198782 is about 304.3757976640.

The spelling of 28198782 in words is "twenty-eight million, one hundred ninety-eight thousand, seven hundred eighty-two".