222639240 has 32 divisors (see below), whose sum is σ = 667918080. Its totient is φ = 59370432.

The previous prime is 222639233. The next prime is 222639247. The reversal of 222639240 is 42936222.

It is an interprime number because it is at equal distance from previous prime (222639233) and next prime (222639247).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 222639198 and 222639207.

It is not an unprimeable number, because it can be changed into a prime (222639247) 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, 927544 + ... + 927783.

It is an arithmetic number, because the mean of its divisors is an integer number (20872440).

Almost surely, 2^222639240 is an apocalyptic number.

222639240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222639240 is an abundant number, since it is smaller than the sum of its proper divisors (445278840).

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

222639240 is a wasteful number, since it uses less digits than its factorization.

222639240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855341 (or 1855337 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 222639240 is about 14921.1004956069. The cubic root of 222639240 is about 606.0855133168.

The spelling of 222639240 in words is "two hundred twenty-two million, six hundred thirty-nine thousand, two hundred forty".