138349785 has 48 divisors (see below), whose sum is σ = 263837952. Its totient is φ = 61689600.

The previous prime is 138349747. The next prime is 138349789. The reversal of 138349785 is 587943831.

138349785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138349785 - 2⁹ = 138349273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138349789) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27840 + ... + 32430.

It is an arithmetic number, because the mean of its divisors is an integer number (5496624).

Almost surely, 2^138349785 is an apocalyptic number.

138349785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138349785 is a deficient number, since it is larger than the sum of its proper divisors (125488167).

138349785 is a wasteful number, since it uses less digits than its factorization.

138349785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654 (or 4647 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 138349785 is about 11762.2185407346. The cubic root of 138349785 is about 517.2011670585.

The spelling of 138349785 in words is "one hundred thirty-eight million, three hundred forty-nine thousand, seven hundred eighty-five".