138043026 has 48 divisors (see below), whose sum is σ = 345485088. Its totient is φ = 39369600.

The previous prime is 138043019. The next prime is 138043051. The reversal of 138043026 is 620340831.

It is a happy 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 23 ways as a sum of consecutive naturals, for example, 17140 + ... + 23871.

It is an arithmetic number, because the mean of its divisors is an integer number (7197606).

Almost surely, 2^138043026 is an apocalyptic number.

138043026 is an abundant number, since it is smaller than the sum of its proper divisors (207442062).

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

138043026 is a wasteful number, since it uses less digits than its factorization.

138043026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41047 (or 41044 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 138043026 is about 11749.1712899251. The cubic root of 138043026 is about 516.8186257613.

Adding to 138043026 its reverse (620340831), we get a palindrome (758383857).

The spelling of 138043026 in words is "one hundred thirty-eight million, forty-three thousand, twenty-six".