138834745 has 32 divisors (see below), whose sum is σ = 201611520. Its totient is φ = 89752320.

The previous prime is 138834737. The next prime is 138834769. The reversal of 138834745 is 547438831.

It is not a de Polignac number, because 138834745 - 2³ = 138834737 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42055 + ... + 45235.

It is an arithmetic number, because the mean of its divisors is an integer number (6300360).

Almost surely, 2^138834745 is an apocalyptic number.

It is an amenable number.

138834745 is a deficient number, since it is larger than the sum of its proper divisors (62776775).

138834745 is a wasteful number, since it uses less digits than its factorization.

138834745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265.

The product of its digits is 322560, while the sum is 43.

The square root of 138834745 is about 11782.8156651965. The cubic root of 138834745 is about 517.8047805184.

The spelling of 138834745 in words is "one hundred thirty-eight million, eight hundred thirty-four thousand, seven hundred forty-five".