222152728 has 32 divisors (see below), whose sum is σ = 483852960. Its totient is φ = 93646080.

The previous prime is 222152717. The next prime is 222152729. The reversal of 222152728 is 827251222.

It is a self number, because there is not a number n which added to its sum of digits gives 222152728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222152729) by changing a digit.

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, 29101 + ... + 35932.

It is an arithmetic number, because the mean of its divisors is an integer number (15120405).

Almost surely, 2^222152728 is an apocalyptic number.

222152728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

222152728 is an abundant number, since it is smaller than the sum of its proper divisors (261700232).

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

222152728 is a wasteful number, since it uses less digits than its factorization.

222152728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65107 (or 65103 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 222152728 is about 14904.7887606635. The cubic root of 222152728 is about 605.6437180033.

The spelling of 222152728 in words is "two hundred twenty-two million, one hundred fifty-two thousand, seven hundred twenty-eight".