222758440 has 16 divisors (see below), whose sum is σ = 501206580. Its totient is φ = 89103360.

The previous prime is 222758363. The next prime is 222758441. The reversal of 222758440 is 44857222.

It can be written as a sum of positive squares in 2 ways, for example, as 207532836 + 15225604 = 14406^2 + 3902^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222758396 and 222758405.

It is not an unprimeable number, because it can be changed into a prime (222758441) 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 3 ways as a sum of consecutive naturals, for example, 2784441 + ... + 2784520.

Almost surely, 2^222758440 is an apocalyptic number.

222758440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222758440 is an abundant number, since it is smaller than the sum of its proper divisors (278448140).

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

222758440 is a wasteful number, since it uses less digits than its factorization.

222758440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5568972 (or 5568968 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 222758440 is about 14925.0943045597. The cubic root of 222758440 is about 606.1936591281.

The spelling of 222758440 in words is "two hundred twenty-two million, seven hundred fifty-eight thousand, four hundred forty".