142878778 has 64 divisors (see below), whose sum is σ = 270978048. Its totient is φ = 55111680.

The previous prime is 142878751. The next prime is 142878779. The reversal of 142878778 is 877878241.

It is not an unprimeable number, because it can be changed into a prime (142878779) 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, 592738 + ... + 592978.

It is an arithmetic number, because the mean of its divisors is an integer number (4234032).

Almost surely, 2^142878778 is an apocalyptic number.

142878778 is a deficient number, since it is larger than the sum of its proper divisors (128099270).

142878778 is a wasteful number, since it uses less digits than its factorization.

142878778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367.

The product of its digits is 1404928, while the sum is 52.

The square root of 142878778 is about 11953.1911220393. The cubic root of 142878778 is about 522.7843471099.

The spelling of 142878778 in words is "one hundred forty-two million, eight hundred seventy-eight thousand, seven hundred seventy-eight".