1229240320 has 192 divisors, whose sum is σ = 3679603200. Its totient is φ = 382894080.

The previous prime is 1229240317. The next prime is 1229240333. The reversal of 1229240320 is 230429221.

It is a super-2 number, since 2×1229240320² = 3022063528627404800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 787701 + ... + 789259.

It is an arithmetic number, because the mean of its divisors is an integer number (19164600).

Almost surely, 2^1229240320 is an apocalyptic number.

1229240320 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 1229240320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1839801600).

1229240320 is an abundant number, since it is smaller than the sum of its proper divisors (2450362880).

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

1229240320 is a wasteful number, since it uses less digits than its factorization.

1229240320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604 (or 1584 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1229240320 is about 35060.5236697914. The cubic root of 1229240320 is about 1071.2206409282.

Adding to 1229240320 its reverse (230429221), we get a palindrome (1459669541).

The spelling of 1229240320 in words is "one billion, two hundred twenty-nine million, two hundred forty thousand, three hundred twenty".