109278228 has 24 divisors (see below), whose sum is σ = 255497760. Its totient is φ = 36352480.

The previous prime is 109278217. The next prime is 109278229. The reversal of 109278228 is 822872901.

It is a super-2 number, since 2×109278228² = 23883462229639968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109278229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2838 + ... + 15053.

It is an arithmetic number, because the mean of its divisors is an integer number (10645740).

Almost surely, 2^109278228 is an apocalyptic number.

It is an amenable number.

109278228 is an abundant number, since it is smaller than the sum of its proper divisors (146219532).

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

109278228 is a wasteful number, since it uses less digits than its factorization.

109278228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18407 (or 18405 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 109278228 is about 10453.6227213345. The cubic root of 109278228 is about 478.0917116557.

The spelling of 109278228 in words is "one hundred nine million, two hundred seventy-eight thousand, two hundred twenty-eight".