222178940 has 24 divisors (see below), whose sum is σ = 467706960. Its totient is φ = 88656128.

The previous prime is 222178939. The next prime is 222178963. The reversal of 222178940 is 49871222.

It is a self number, because there is not a number n which added to its sum of digits gives 222178940.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4877 + ... + 21636.

It is an arithmetic number, because the mean of its divisors is an integer number (19487790).

Almost surely, 2^222178940 is an apocalyptic number.

222178940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222178940 is an abundant number, since it is smaller than the sum of its proper divisors (245528020).

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

222178940 is a wasteful number, since it uses less digits than its factorization.

222178940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26941 (or 26939 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 222178940 is about 14905.6680494368. The cubic root of 222178940 is about 605.6675372154.

The spelling of 222178940 in words is "two hundred twenty-two million, one hundred seventy-eight thousand, nine hundred forty".