26020809 has 6 divisors (see below), whose sum is σ = 37585626. Its totient is φ = 17347200.

The previous prime is 26020793. The next prime is 26020817. The reversal of 26020809 is 90802062.

It can be written as a sum of positive squares in only one way, i.e., 24206400 + 1814409 = 4920^2 + 1347^2 .

It is not a de Polignac number, because 26020809 - 2⁴ = 26020793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26020109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1445592 + ... + 1445609.

It is an arithmetic number, because the mean of its divisors is an integer number (6264271).

Almost surely, 2^26020809 is an apocalyptic number.

It is an amenable number.

26020809 is a deficient number, since it is larger than the sum of its proper divisors (11564817).

26020809 is a wasteful number, since it uses less digits than its factorization.

26020809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891207 (or 2891204 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 26020809 is about 5101.0595958095. The cubic root of 26020809 is about 296.3286198430.

The spelling of 26020809 in words is "twenty-six million, twenty thousand, eight hundred nine".