1142440280 has 32 divisors (see below), whose sum is σ = 2625186240. Its totient is φ = 447252480.

The previous prime is 1142440279. The next prime is 1142440331. The reversal of 1142440280 is 820442411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301961 + ... + 305720.

It is an arithmetic number, because the mean of its divisors is an integer number (82037070).

Almost surely, 2^1142440280 is an apocalyptic number.

1142440280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142440280 is an abundant number, since it is smaller than the sum of its proper divisors (1482745960).

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

1142440280 is a wasteful number, since it uses less digits than its factorization.

1142440280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607739 (or 607735 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 1142440280 is about 33800.0041420116. The cubic root of 1142440280 is about 1045.3887826377.

Adding to 1142440280 its reverse (820442411), we get a palindrome (1962882691).

The spelling of 1142440280 in words is "one billion, one hundred forty-two million, four hundred forty thousand, two hundred eighty".