142089738 has 32 divisors (see below), whose sum is σ = 325140480. Its totient is φ = 40551600.

The previous prime is 142089737. The next prime is 142089749. The reversal of 142089738 is 837980241.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 142089738.

It is not an unprimeable number, because it can be changed into a prime (142089737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59263 + ... + 61613.

It is an arithmetic number, because the mean of its divisors is an integer number (10160640).

Almost surely, 2^142089738 is an apocalyptic number.

142089738 is an abundant number, since it is smaller than the sum of its proper divisors (183050742).

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

142089738 is a wasteful number, since it uses less digits than its factorization.

142089738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802.

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

The square root of 142089738 is about 11920.1400159562. The cubic root of 142089738 is about 521.8202211163.

The spelling of 142089738 in words is "one hundred forty-two million, eighty-nine thousand, seven hundred thirty-eight".