1222616640 has 448 divisors, whose sum is σ = 4681728000. Its totient is φ = 270047232.

The previous prime is 1222616623. The next prime is 1222616723. The reversal of 1222616640 is 466162221.

It is a tau number, because it is divible by the number of its divisors (448).

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 = 1222616598 and 1222616607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15476121 + ... + 15476199.

Almost surely, 2^1222616640 is an apocalyptic number.

1222616640 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 1222616640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2340864000).

1222616640 is an abundant number, since it is smaller than the sum of its proper divisors (3459111360).

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

1222616640 is an equidigital number, since it uses as much as digits as its factorization.

1222616640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1222616640 is about 34965.9354229227. The cubic root of 1222616640 is about 1069.2931074987.

Adding to 1222616640 its reverse (466162221), we get a palindrome (1688778861).

The spelling of 1222616640 in words is "one billion, two hundred twenty-two million, six hundred sixteen thousand, six hundred forty".