222026640 has 160 divisors (see below), whose sum is σ = 771486336. Its totient is φ = 52346880.

The previous prime is 222026591. The next prime is 222026671. The reversal of 222026640 is 46620222.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 222026640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96544 + ... + 98816.

Almost surely, 2^222026640 is an apocalyptic number.

222026640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222026640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385743168).

222026640 is an abundant number, since it is smaller than the sum of its proper divisors (549459696).

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

222026640 is a wasteful number, since it uses less digits than its factorization.

222026640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337 (or 2331 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 222026640 is about 14900.5583787991. The cubic root of 222026640 is about 605.5291138782.

Adding to 222026640 its reverse (46620222), we get a palindrome (268646862).

The spelling of 222026640 in words is "two hundred twenty-two million, twenty-six thousand, six hundred forty".