138900026 has 8 divisors (see below), whose sum is σ = 215071104. Its totient is φ = 67209660.

The previous prime is 138900007. The next prime is 138900029. The reversal of 138900026 is 620009831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138900029) 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 3 ways as a sum of consecutive naturals, for example, 1120100 + ... + 1120223.

It is an arithmetic number, because the mean of its divisors is an integer number (26883888).

Almost surely, 2^138900026 is an apocalyptic number.

138900026 is a deficient number, since it is larger than the sum of its proper divisors (76171078).

138900026 is a wasteful number, since it uses less digits than its factorization.

138900026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240356.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 138900026 is about 11785.5855179113. The cubic root of 138900026 is about 517.8859261931.

Adding to 138900026 its reverse (620009831), we get a palindrome (758909857).

The spelling of 138900026 in words is "one hundred thirty-eight million, nine hundred thousand, twenty-six".