26729138 has 4 divisors (see below), whose sum is σ = 40093710. Its totient is φ = 13364568.

The previous prime is 26729107. The next prime is 26729141. The reversal of 26729138 is 83192762.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83192762 = 2 ⋅41596381.

It can be written as a sum of positive squares in only one way, i.e., 20313049 + 6416089 = 4507^2 + 2533^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6682283 + ... + 6682286.

Almost surely, 2^26729138 is an apocalyptic number.

26729138 is a deficient number, since it is larger than the sum of its proper divisors (13364572).

26729138 is a wasteful number, since it uses less digits than its factorization.

26729138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13364571.

The product of its digits is 36288, while the sum is 38.

The square root of 26729138 is about 5170.0230173569. The cubic root of 26729138 is about 298.9934339337.

The spelling of 26729138 in words is "twenty-six million, seven hundred twenty-nine thousand, one hundred thirty-eight".