142778418 has 16 divisors (see below), whose sum is σ = 285983136. Its totient is φ = 47521760.

The previous prime is 142778417. The next prime is 142778429. The reversal of 142778418 is 814877241.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 142778418.

It is not an unprimeable number, because it can be changed into a prime (142778413) 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, 13323 + ... + 21518.

It is an arithmetic number, because the mean of its divisors is an integer number (17873946).

Almost surely, 2^142778418 is an apocalyptic number.

142778418 is an abundant number, since it is smaller than the sum of its proper divisors (143204718).

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

142778418 is a wasteful number, since it uses less digits than its factorization.

142778418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35529.

The product of its digits is 100352, while the sum is 42.

The square root of 142778418 is about 11948.9923424530. The cubic root of 142778418 is about 522.6619148237.

The spelling of 142778418 in words is "one hundred forty-two million, seven hundred seventy-eight thousand, four hundred eighteen".