42690138 has 16 divisors (see below), whose sum is σ = 85578336. Its totient is φ = 14197040.

The previous prime is 42690133. The next prime is 42690163. The reversal of 42690138 is 83109624.

42690138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 42690099 and 42690108.

It is not an unprimeable number, because it can be changed into a prime (42690133) 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 7 ways as a sum of consecutive naturals, for example, 5373 + ... + 10688.

It is an arithmetic number, because the mean of its divisors is an integer number (5348646).

Almost surely, 2^42690138 is an apocalyptic number.

42690138 is an abundant number, since it is smaller than the sum of its proper divisors (42888198).

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

42690138 is a wasteful number, since it uses less digits than its factorization.

42690138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16509.

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

The square root of 42690138 is about 6533.7690500966. The cubic root of 42690138 is about 349.4962494558.

The spelling of 42690138 in words is "forty-two million, six hundred ninety thousand, one hundred thirty-eight".