28112722 has 16 divisors (see below), whose sum is σ = 47487744. Its totient is φ = 12366000.

The previous prime is 28112719. The next prime is 28112729. The reversal of 28112722 is 22721182.

It is not an unprimeable number, because it can be changed into a prime (28112729) 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, 19929 + ... + 21292.

It is an arithmetic number, because the mean of its divisors is an integer number (2967984).

Almost surely, 2^28112722 is an apocalyptic number.

28112722 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28112722 is a deficient number, since it is larger than the sum of its proper divisors (19375022).

28112722 is a wasteful number, since it uses less digits than its factorization.

28112722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41265.

The product of its digits is 896, while the sum is 25.

The square root of 28112722 is about 5302.1431515945. The cubic root of 28112722 is about 304.0658401369.

The spelling of 28112722 in words is "twenty-eight million, one hundred twelve thousand, seven hundred twenty-two".