142639028 has 24 divisors (see below), whose sum is σ = 285684672. Its totient is φ = 61043904.

The previous prime is 142638997. The next prime is 142639039. The reversal of 142639028 is 820936241.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18800 + ... + 25272.

It is an arithmetic number, because the mean of its divisors is an integer number (11903528).

Almost surely, 2^142639028 is an apocalyptic number.

It is an amenable number.

142639028 is an abundant number, since it is smaller than the sum of its proper divisors (143045644).

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

142639028 is a wasteful number, since it uses less digits than its factorization.

142639028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7271 (or 7269 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 142639028 is about 11943.1582087821. The cubic root of 142639028 is about 522.4917734105.

The spelling of 142639028 in words is "one hundred forty-two million, six hundred thirty-nine thousand, twenty-eight".