222723438 has 32 divisors (see below), whose sum is σ = 516062976. Its totient is φ = 62762688.

The previous prime is 222723433. The next prime is 222723533. The reversal of 222723438 is 834327222.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222723399 and 222723408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222723433) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 33256 + ... + 39387.

It is an arithmetic number, because the mean of its divisors is an integer number (16126968).

Almost surely, 2^222723438 is an apocalyptic number.

222723438 is an abundant number, since it is smaller than the sum of its proper divisors (293339538).

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

222723438 is a wasteful number, since it uses less digits than its factorization.

222723438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72728.

The product of its digits is 32256, while the sum is 33.

The square root of 222723438 is about 14923.9216695881. The cubic root of 222723438 is about 606.1619070923.

The spelling of 222723438 in words is "two hundred twenty-two million, seven hundred twenty-three thousand, four hundred thirty-eight".