142817838 has 16 divisors (see below), whose sum is σ = 288464976. Its totient is φ = 47134400.

The previous prime is 142817827. The next prime is 142817839. The reversal of 142817838 is 838718241.

It is a self number, because there is not a number n which added to its sum of digits gives 142817838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142817839) 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, 117231 + ... + 118442.

It is an arithmetic number, because the mean of its divisors is an integer number (18029061).

Almost surely, 2^142817838 is an apocalyptic number.

142817838 is an abundant number, since it is smaller than the sum of its proper divisors (145647138).

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

142817838 is a wasteful number, since it uses less digits than its factorization.

142817838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235779.

The product of its digits is 86016, while the sum is 42.

The square root of 142817838 is about 11950.6417400908. The cubic root of 142817838 is about 522.7100113477.

The spelling of 142817838 in words is "one hundred forty-two million, eight hundred seventeen thousand, eight hundred thirty-eight".