1142422440 has 128 divisors (see below), whose sum is σ = 3664776960. Its totient is φ = 283889664.

The previous prime is 1142422439. The next prime is 1142422441. The reversal of 1142422440 is 442242411.

1142422440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1142422439) and next prime (1142422441).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1142422440.

It is not an unprimeable number, because it can be changed into a prime (1142422441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207402 + ... + 212838.

It is an arithmetic number, because the mean of its divisors is an integer number (28631070).

Almost surely, 2^1142422440 is an apocalyptic number.

1142422440 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 1142422440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1832388480).

1142422440 is an abundant number, since it is smaller than the sum of its proper divisors (2522354520).

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

1142422440 is a wasteful number, since it uses less digits than its factorization.

1142422440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571 (or 5567 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 1142422440 is about 33799.7402356882. The cubic root of 1142422440 is about 1045.3833411183.

Adding to 1142422440 its reverse (442242411), we get a palindrome (1584664851).

The spelling of 1142422440 in words is "one billion, one hundred forty-two million, four hundred twenty-two thousand, four hundred forty".