142090638 has 16 divisors (see below), whose sum is σ = 286996176. Its totient is φ = 46894400.

The previous prime is 142090583. The next prime is 142090649. The reversal of 142090638 is 836090241.

It is a junction number, because it is equal to n+sod(n) for n = 142090599 and 142090608.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 116631 + ... + 117842.

It is an arithmetic number, because the mean of its divisors is an integer number (17937261).

Almost surely, 2^142090638 is an apocalyptic number.

142090638 is an abundant number, since it is smaller than the sum of its proper divisors (144905538).

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

142090638 is a wasteful number, since it uses less digits than its factorization.

142090638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234579.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 142090638 is about 11920.1777671308. The cubic root of 142090638 is about 521.8213228548.

The spelling of 142090638 in words is "one hundred forty-two million, ninety thousand, six hundred thirty-eight".