138626434 has 8 divisors (see below), whose sum is σ = 210445200. Its totient is φ = 68478036.

The previous prime is 138626431. The next prime is 138626437. The reversal of 138626434 is 434626831.

It is an interprime number because it is at equal distance from previous prime (138626431) and next prime (138626437).

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

It is a junction number, because it is equal to n+sod(n) for n = 138626393 and 138626402.

It is not an unprimeable number, because it can be changed into a prime (138626431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417384 + ... + 417715.

It is an arithmetic number, because the mean of its divisors is an integer number (26305650).

Almost surely, 2^138626434 is an apocalyptic number.

138626434 is a deficient number, since it is larger than the sum of its proper divisors (71818766).

138626434 is an equidigital number, since it uses as much as digits as its factorization.

138626434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835184.

The product of its digits is 82944, while the sum is 37.

The square root of 138626434 is about 11773.9727365066. The cubic root of 138626434 is about 517.5456752920.

The spelling of 138626434 in words is "one hundred thirty-eight million, six hundred twenty-six thousand, four hundred thirty-four".