26397636 has 12 divisors (see below), whose sum is σ = 61594512. Its totient is φ = 8799208.

The previous prime is 26397611. The next prime is 26397641. The reversal of 26397636 is 63679362.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099890 + ... + 1099913.

It is an arithmetic number, because the mean of its divisors is an integer number (5132876).

Almost surely, 2^26397636 is an apocalyptic number.

It is an amenable number.

26397636 is an abundant number, since it is smaller than the sum of its proper divisors (35196876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26397636 is a wasteful number, since it uses less digits than its factorization.

26397636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199810 (or 2199808 counting only the distinct ones).

The product of its digits is 244944, while the sum is 42.

The square root of 26397636 is about 5137.8629798779. The cubic root of 26397636 is about 297.7522226075.

The spelling of 26397636 in words is "twenty-six million, three hundred ninety-seven thousand, six hundred thirty-six".