1122143440 has 80 divisors (see below), whose sum is σ = 2851246080. Its totient is φ = 407324160.

The previous prime is 1122143419. The next prime is 1122143447. The reversal of 1122143440 is 443412211.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122143447) 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, 876721 + ... + 877999.

It is an arithmetic number, because the mean of its divisors is an integer number (35640576).

Almost surely, 2^1122143440 is an apocalyptic number.

1122143440 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 1122143440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1425623040).

1122143440 is an abundant number, since it is smaller than the sum of its proper divisors (1729102640).

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

1122143440 is a wasteful number, since it uses less digits than its factorization.

1122143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300 (or 2294 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1122143440 is about 33498.4095144829. The cubic root of 1122143440 is about 1039.1608862678.

Adding to 1122143440 its reverse (443412211), we get a palindrome (1565555651).

The spelling of 1122143440 in words is "one billion, one hundred twenty-two million, one hundred forty-three thousand, four hundred forty".