138260007 has 16 divisors (see below), whose sum is σ = 209594880. Its totient is φ = 90029016.

The previous prime is 138259999. The next prime is 138260021. The reversal of 138260007 is 700062831.

It is not a de Polignac number, because 138260007 - 2³ = 138259999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138260047) 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, 58383 + ... + 60704.

It is an arithmetic number, because the mean of its divisors is an integer number (13099680).

Almost surely, 2^138260007 is an apocalyptic number.

138260007 is a deficient number, since it is larger than the sum of its proper divisors (71334873).

138260007 is a wasteful number, since it uses less digits than its factorization.

138260007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119139 (or 119133 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 138260007 is about 11758.4015495304. The cubic root of 138260007 is about 517.0892687185.

The spelling of 138260007 in words is "one hundred thirty-eight million, two hundred sixty thousand, seven".