28311102 has 24 divisors (see below), whose sum is σ = 64569960. Its totient is φ = 8940240.

The previous prime is 28311053. The next prime is 28311113. The reversal of 28311102 is 20111382.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41049 + ... + 41732.

It is an arithmetic number, because the mean of its divisors is an integer number (2690415).

Almost surely, 2^28311102 is an apocalyptic number.

28311102 is an abundant number, since it is smaller than the sum of its proper divisors (36258858).

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

28311102 is a wasteful number, since it uses less digits than its factorization.

28311102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82808 (or 82805 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 28311102 is about 5320.8177942869. The cubic root of 28311102 is about 304.7793871815.

Adding to 28311102 its reverse (20111382), we get a palindrome (48422484).

The spelling of 28311102 in words is "twenty-eight million, three hundred eleven thousand, one hundred two".