28161122 has 16 divisors (see below), whose sum is σ = 46418400. Its totient is φ = 12707040.

The previous prime is 28161103. The next prime is 28161139. The reversal of 28161122 is 22116182.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1547 + ... + 7662.

It is an arithmetic number, because the mean of its divisors is an integer number (2901150).

Almost surely, 2^28161122 is an apocalyptic number.

28161122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28161122 is a deficient number, since it is larger than the sum of its proper divisors (18257278).

28161122 is a wasteful number, since it uses less digits than its factorization.

28161122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9361.

The product of its digits is 384, while the sum is 23.

The square root of 28161122 is about 5306.7053809308. The cubic root of 28161122 is about 304.2402374442.

The spelling of 28161122 in words is "twenty-eight million, one hundred sixty-one thousand, one hundred twenty-two".