138434307 has 16 divisors (see below), whose sum is σ = 203911680. Its totient is φ = 82836000.

The previous prime is 138434299. The next prime is 138434311. The reversal of 138434307 is 703434831.

It is not a de Polignac number, because 138434307 - 2³ = 138434299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (138434347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23944 + ... + 29157.

It is an arithmetic number, because the mean of its divisors is an integer number (12744480).

Almost surely, 2^138434307 is an apocalyptic number.

138434307 is a deficient number, since it is larger than the sum of its proper divisors (65477373).

138434307 is a wasteful number, since it uses less digits than its factorization.

138434307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53194.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 138434307 is about 11765.8109367778. The cubic root of 138434307 is about 517.3064701443.

The spelling of 138434307 in words is "one hundred thirty-eight million, four hundred thirty-four thousand, three hundred seven".