138390895 has 8 divisors (see below), whose sum is σ = 166132656. Its totient is φ = 110670336.

The previous prime is 138390881. The next prime is 138390919. The reversal of 138390895 is 598093831.

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 138390895 - 2²⁵ = 104836463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20404 + ... + 26326.

It is an arithmetic number, because the mean of its divisors is an integer number (20766582).

Almost surely, 2^138390895 is an apocalyptic number.

138390895 is a deficient number, since it is larger than the sum of its proper divisors (27741761).

138390895 is an equidigital number, since it uses as much as digits as its factorization.

138390895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10601.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 138390895 is about 11763.9659554081. The cubic root of 138390895 is about 517.2523899651.

The spelling of 138390895 in words is "one hundred thirty-eight million, three hundred ninety thousand, eight hundred ninety-five".