1222355340 has 96 divisors (see below), whose sum is σ = 3810240000. Its totient is φ = 325331136.

The previous prime is 1222355317. The next prime is 1222355341. The reversal of 1222355340 is 435532221.

It is a happy number.

1222355340 is a `hidden beast` number, since 122 + 2 + 3 + 5 + 534 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1222355341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321571 + ... + 325349.

It is an arithmetic number, because the mean of its divisors is an integer number (39690000).

Almost surely, 2^1222355340 is an apocalyptic number.

1222355340 is a gapful number since it is divisible by the number (10) 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 1222355340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1905120000).

1222355340 is an abundant number, since it is smaller than the sum of its proper divisors (2587884660).

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

1222355340 is a wasteful number, since it uses less digits than its factorization.

1222355340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4396 (or 4388 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 1222355340 is about 34962.1987294850. The cubic root of 1222355340 is about 1069.2169249388.

Adding to 1222355340 its reverse (435532221), we get a palindrome (1657887561).

The spelling of 1222355340 in words is "one billion, two hundred twenty-two million, three hundred fifty-five thousand, three hundred forty".