142739808 has 24 divisors (see below), whose sum is σ = 374692248. Its totient is φ = 47579904.

The previous prime is 142739801. The next prime is 142739809. The reversal of 142739808 is 808937241.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 142739808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142739801) 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 3 ways as a sum of consecutive naturals, for example, 743341 + ... + 743532.

It is an arithmetic number, because the mean of its divisors is an integer number (15612177).

Almost surely, 2^142739808 is an apocalyptic number.

It is an amenable number.

142739808 is an abundant number, since it is smaller than the sum of its proper divisors (231952440).

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

142739808 is a wasteful number, since it uses less digits than its factorization.

142739808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486886 (or 1486878 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 142739808 is about 11947.3766158098. The cubic root of 142739808 is about 522.6147980020.

The spelling of 142739808 in words is "one hundred forty-two million, seven hundred thirty-nine thousand, eight hundred eight".