142389790 has 64 divisors (see below), whose sum is σ = 282175488. Its totient is φ = 51520000.

The previous prime is 142389787. The next prime is 142389881. The reversal of 142389790 is 97983241.

142389790 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 567165 + ... + 567415.

It is an arithmetic number, because the mean of its divisors is an integer number (4408992).

Almost surely, 2^142389790 is an apocalyptic number.

142389790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142389790 is a deficient number, since it is larger than the sum of its proper divisors (139785698).

142389790 is a wasteful number, since it uses less digits than its factorization.

142389790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 142389790 is about 11932.7193045005. The cubic root of 142389790 is about 522.1872734689.

The spelling of 142389790 in words is "one hundred forty-two million, three hundred eighty-nine thousand, seven hundred ninety".