28081122 has 16 divisors (see below), whose sum is σ = 56304480. Its totient is φ = 9336672.

The previous prime is 28081117. The next prime is 28081153. The reversal of 28081122 is 22118082.

It is a junction number, because it is equal to n+sod(n) for n = 28081092 and 28081101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3268 + ... + 8175.

It is an arithmetic number, because the mean of its divisors is an integer number (3519030).

Almost surely, 2^28081122 is an apocalyptic number.

28081122 is an abundant number, since it is smaller than the sum of its proper divisors (28223358).

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

28081122 is a wasteful number, since it uses less digits than its factorization.

28081122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11857.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 28081122 is about 5299.1623866419. The cubic root of 28081122 is about 303.9518694000.

It can be divided in two parts, 28081 and 122, that added together give a triangular number (28203 = T₂₃₇).

The spelling of 28081122 in words is "twenty-eight million, eighty-one thousand, one hundred twenty-two".