142389786 has 48 divisors (see below), whose sum is σ = 361398240. Its totient is φ = 36983520.

The previous prime is 142389713. The next prime is 142389787. The reversal of 142389786 is 687983241.

It is not an unprimeable number, because it can be changed into a prime (142389787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18781 + ... + 25248.

It is an arithmetic number, because the mean of its divisors is an integer number (7529130).

Almost surely, 2^142389786 is an apocalyptic number.

142389786 is an abundant number, since it is smaller than the sum of its proper divisors (219008454).

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

142389786 is a wasteful number, since it uses less digits than its factorization.

142389786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44059 (or 44052 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 142389786 is about 11932.7191368942. The cubic root of 142389786 is about 522.1872685791.

The spelling of 142389786 in words is "one hundred forty-two million, three hundred eighty-nine thousand, seven hundred eighty-six".