26139729 has 16 divisors (see below), whose sum is σ = 43453440. Its totient is φ = 13578960.

The previous prime is 26139713. The next prime is 26139739. The reversal of 26139729 is 92793162.

It is not a de Polignac number, because 26139729 - 2⁴ = 26139713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26139739) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 56349 + ... + 56810.

It is an arithmetic number, because the mean of its divisors is an integer number (2715840).

Almost surely, 2^26139729 is an apocalyptic number.

It is an amenable number.

26139729 is a deficient number, since it is larger than the sum of its proper divisors (17313711).

26139729 is a wasteful number, since it uses less digits than its factorization.

26139729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113180.

The product of its digits is 40824, while the sum is 39.

The square root of 26139729 is about 5112.7027099177. The cubic root of 26139729 is about 296.7793597591.

The spelling of 26139729 in words is "twenty-six million, one hundred thirty-nine thousand, seven hundred twenty-nine".