26820729 has 12 divisors (see below), whose sum is σ = 41721316. Its totient is φ = 16504992.

The previous prime is 26820719. The next prime is 26820763. The reversal of 26820729 is 92702862.

It can be written as a sum of positive squares in 2 ways, for example, as 13860729 + 12960000 = 3723^2 + 3600^2 .

It is not a de Polignac number, because 26820729 - 2⁵ = 26820697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26820693 and 26820702.

It is not an unprimeable number, because it can be changed into a prime (26820719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114502 + ... + 114735.

Almost surely, 2^26820729 is an apocalyptic number.

It is an amenable number.

26820729 is a deficient number, since it is larger than the sum of its proper divisors (14900587).

26820729 is a wasteful number, since it uses less digits than its factorization.

26820729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229256 (or 229253 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 26820729 is about 5178.8733330716. The cubic root of 26820729 is about 299.3345583829.

The spelling of 26820729 in words is "twenty-six million, eight hundred twenty thousand, seven hundred twenty-nine".