28268742 has 16 divisors (see below), whose sum is σ = 57465072. Its totient is φ = 9268320.

The previous prime is 28268731. The next prime is 28268743. The reversal of 28268742 is 24786282.

It is a self number, because there is not a number n which added to its sum of digits gives 28268742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38253 + ... + 38984.

It is an arithmetic number, because the mean of its divisors is an integer number (3591567).

Almost surely, 2^28268742 is an apocalyptic number.

28268742 is an abundant number, since it is smaller than the sum of its proper divisors (29196330).

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

28268742 is a wasteful number, since it uses less digits than its factorization.

28268742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77303.

The product of its digits is 86016, while the sum is 39.

The square root of 28268742 is about 5316.8357130910. The cubic root of 28268742 is about 304.6273043317.

The spelling of 28268742 in words is "twenty-eight million, two hundred sixty-eight thousand, seven hundred forty-two".