138261356 has 6 divisors (see below), whose sum is σ = 241957380. Its totient is φ = 69130676.

The previous prime is 138261301. The next prime is 138261371. The reversal of 138261356 is 653162831.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17282666 + ... + 17282673.

It is an arithmetic number, because the mean of its divisors is an integer number (40326230).

Almost surely, 2^138261356 is an apocalyptic number.

It is an amenable number.

138261356 is a deficient number, since it is larger than the sum of its proper divisors (103696024).

138261356 is a wasteful number, since it uses less digits than its factorization.

138261356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34565343 (or 34565341 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 138261356 is about 11758.4589126297. The cubic root of 138261356 is about 517.0909504561.

The spelling of 138261356 in words is "one hundred thirty-eight million, two hundred sixty-one thousand, three hundred fifty-six".