138632434 has 8 divisors (see below), whose sum is σ = 214656768. Its totient is φ = 67080180.

The previous prime is 138632423. The next prime is 138632449. The reversal of 138632434 is 434236831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 138632434.

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 3 ways as a sum of consecutive naturals, for example, 1117942 + ... + 1118065.

It is an arithmetic number, because the mean of its divisors is an integer number (26832096).

Almost surely, 2^138632434 is an apocalyptic number.

138632434 is a deficient number, since it is larger than the sum of its proper divisors (76024334).

138632434 is a wasteful number, since it uses less digits than its factorization.

138632434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236040.

The product of its digits is 41472, while the sum is 34.

The square root of 138632434 is about 11774.2275330486. The cubic root of 138632434 is about 517.5531419518.

The spelling of 138632434 in words is "one hundred thirty-eight million, six hundred thirty-two thousand, four hundred thirty-four".