1142440278 has 16 divisors (see below), whose sum is σ = 2611292160. Its totient is φ = 326411496.

The previous prime is 1142440219. The next prime is 1142440279. The reversal of 1142440278 is 8720442411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142440279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13600438 + ... + 13600521.

It is an arithmetic number, because the mean of its divisors is an integer number (163205760).

Almost surely, 2^1142440278 is an apocalyptic number.

1142440278 is an abundant number, since it is smaller than the sum of its proper divisors (1468851882).

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

1142440278 is a wasteful number, since it uses less digits than its factorization.

1142440278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27200971.

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 1142440278 is about 33800.0041124258. The cubic root of 1142440278 is about 1045.3887820277.

Adding to 1142440278 its reverse (8720442411), we get a palindrome (9862882689).

The spelling of 1142440278 in words is "one billion, one hundred forty-two million, four hundred forty thousand, two hundred seventy-eight".