138258269 has 8 divisors (see below), whose sum is σ = 147922080. Its totient is φ = 128833200.

The previous prime is 138258259. The next prime is 138258293. The reversal of 138258269 is 962852831.

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

It is a cyclic number.

It is not a de Polignac number, because 138258269 - 2⁸ = 138258013 is a prime.

It is a super-2 number, since 2×138258269² = 38230697893752722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138258259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58487 + ... + 60804.

It is an arithmetic number, because the mean of its divisors is an integer number (18490260).

Almost surely, 2^138258269 is an apocalyptic number.

138258269 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

138258269 is a deficient number, since it is larger than the sum of its proper divisors (9663811).

138258269 is a wasteful number, since it uses less digits than its factorization.

138258269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119371.

The product of its digits is 207360, while the sum is 44.

The square root of 138258269 is about 11758.3276446951. The cubic root of 138258269 is about 517.0871020160.

The spelling of 138258269 in words is "one hundred thirty-eight million, two hundred fifty-eight thousand, two hundred sixty-nine".