142778688 has 56 divisors (see below), whose sum is σ = 406834848. Its totient is φ = 43931136.

The previous prime is 142778683. The next prime is 142778689. The reversal of 142778688 is 886877241.

It is a self number, because there is not a number n which added to its sum of digits gives 142778688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142778681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26106 + ... + 31097.

It is an arithmetic number, because the mean of its divisors is an integer number (7264908).

Almost surely, 2^142778688 is an apocalyptic number.

It is an amenable number.

142778688 is an abundant number, since it is smaller than the sum of its proper divisors (264056160).

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

142778688 is a wasteful number, since it uses less digits than its factorization.

142778688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57231 (or 57221 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 51.

The square root of 142778688 is about 11949.0036404715. The cubic root of 142778688 is about 522.6622442821.

The spelling of 142778688 in words is "one hundred forty-two million, seven hundred seventy-eight thousand, six hundred eighty-eight".