28722106 has 16 divisors (see below), whose sum is σ = 49325760. Its totient is φ = 12287520.

The previous prime is 28722103. The next prime is 28722107. The reversal of 28722106 is 60122782.

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, 8190 + ... + 11158.

It is an arithmetic number, because the mean of its divisors is an integer number (3082860).

Almost surely, 2^28722106 is an apocalyptic number.

28722106 is a deficient number, since it is larger than the sum of its proper divisors (20603654).

28722106 is a wasteful number, since it uses less digits than its factorization.

28722106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3669.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28722106 is about 5359.3008872427. The cubic root of 28722106 is about 306.2471766504.

Adding to 28722106 its reverse (60122782), we get a palindrome (88844888).

The spelling of 28722106 in words is "twenty-eight million, seven hundred twenty-two thousand, one hundred six".