1142440000 has 175 divisors, whose sum is σ = 3068944967. Its totient is φ = 421824000.

The previous prime is 1142439989. The next prime is 1142440049. The reversal of 1142440000 is 442411.

The square root of 1142440000 is 33800.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 12 ways, for example, as 268173376 + 874266624 = 16376^2 + 29568^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=4, B=130.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 24 ways as a sum of consecutive naturals, for example, 87879994 + ... + 87880006.

Almost surely, 2^1142440000 is an apocalyptic number.

1142440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1142440000 is the 33800-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142440000

1142440000 is an abundant number, since it is smaller than the sum of its proper divisors (1926504967).

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

1142440000 is an frugal number, since it uses more digits than its factorization.

1142440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The cubic root of 1142440000 is about 1045.3886972332.

Multiplying 1142440000 by its sum of digits (16), we get a square (18279040000 = 135200²).

1142440000 divided by its sum of digits (16) gives a square (71402500 = 8450²).

Adding to 1142440000 its reverse (442411), we get a palindrome (1142882411).

The spelling of 1142440000 in words is "one billion, one hundred forty-two million, four hundred forty thousand".