142839220 has 24 divisors (see below), whose sum is σ = 304190208. Its totient is φ = 56330400.

The previous prime is 142839209. The next prime is 142839233. The reversal of 142839220 is 22938241.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48876 + ... + 51715.

It is an arithmetic number, because the mean of its divisors is an integer number (12674592).

Almost surely, 2^142839220 is an apocalyptic number.

142839220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142839220 is an abundant number, since it is smaller than the sum of its proper divisors (161350988).

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

142839220 is a wasteful number, since it uses less digits than its factorization.

142839220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100671 (or 100669 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 142839220 is about 11951.5363029194. The cubic root of 142839220 is about 522.7360959226.

The spelling of 142839220 in words is "one hundred forty-two million, eight hundred thirty-nine thousand, two hundred twenty".