26639745 has 16 divisors (see below), whose sum is σ = 46498752. Its totient is φ = 12916160.

The previous prime is 26639713. The next prime is 26639749. The reversal of 26639745 is 54793662.

It is not a de Polignac number, because 26639745 - 2⁵ = 26639713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26639697 and 26639706.

It is not an unprimeable number, because it can be changed into a prime (26639749) 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, 80562 + ... + 80891.

It is an arithmetic number, because the mean of its divisors is an integer number (2906172).

Almost surely, 2^26639745 is an apocalyptic number.

It is an amenable number.

26639745 is a deficient number, since it is larger than the sum of its proper divisors (19859007).

26639745 is a wasteful number, since it uses less digits than its factorization.

26639745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161472.

The product of its digits is 272160, while the sum is 42.

The square root of 26639745 is about 5161.3704575432. The cubic root of 26639745 is about 298.6597435140.

The spelling of 26639745 in words is "twenty-six million, six hundred thirty-nine thousand, seven hundred forty-five".