28722102 has 16 divisors (see below), whose sum is σ = 57629232. Its totient is φ = 9543200.

The previous prime is 28722097. The next prime is 28722103. The reversal of 28722102 is 20122782.

It is a happy number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28722103) 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, 5649 + ... + 9452.

It is an arithmetic number, because the mean of its divisors is an integer number (3601827).

Almost surely, 2^28722102 is an apocalyptic number.

28722102 is an abundant number, since it is smaller than the sum of its proper divisors (28907130).

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

28722102 is a wasteful number, since it uses less digits than its factorization.

28722102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15423.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 28722102 is about 5359.3005140596. The cubic root of 28722102 is about 306.2471624338.

Adding to 28722102 its reverse (20122782), we get a palindrome (48844884).

The spelling of 28722102 in words is "twenty-eight million, seven hundred twenty-two thousand, one hundred two".