1224312140 has 96 divisors (see below), whose sum is σ = 2769984000. Its totient is φ = 453519360.

The previous prime is 1224312107. The next prime is 1224312161. The reversal of 1224312140 is 412134221.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 2678792 + ... + 2679248.

It is an arithmetic number, because the mean of its divisors is an integer number (28854000).

Almost surely, 2^1224312140 is an apocalyptic number.

1224312140 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 1224312140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1384992000).

1224312140 is an abundant number, since it is smaller than the sum of its proper divisors (1545671860).

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

1224312140 is a wasteful number, since it uses less digits than its factorization.

1224312140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1224312140 is about 34990.1720487339. The cubic root of 1224312140 is about 1069.7871705268.

Adding to 1224312140 its reverse (412134221), we get a palindrome (1636446361).

The spelling of 1224312140 in words is "one billion, two hundred twenty-four million, three hundred twelve thousand, one hundred forty".