1222035640 has 64 divisors (see below), whose sum is σ = 3250756800. Its totient is φ = 404533248.

The previous prime is 1222035629. The next prime is 1222035649. The reversal of 1222035640 is 465302221.

It is a super-2 number, since 2×1222035640² = 2986742210860419200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222035649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67129 + ... + 83368.

It is an arithmetic number, because the mean of its divisors is an integer number (50793075).

Almost surely, 2^1222035640 is an apocalyptic number.

1222035640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222035640 is an abundant number, since it is smaller than the sum of its proper divisors (2028721160).

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

1222035640 is a wasteful number, since it uses less digits than its factorization.

1222035640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150544 (or 150540 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1222035640 is about 34957.6263496251. The cubic root of 1222035640 is about 1069.1237009677.

Adding to 1222035640 its reverse (465302221), we get a palindrome (1687337861).

The spelling of 1222035640 in words is "one billion, two hundred twenty-two million, thirty-five thousand, six hundred forty".