26397816 has 32 divisors (see below), whose sum is σ = 67242960. Its totient is φ = 8632832.

The previous prime is 26397797. The next prime is 26397827. The reversal of 26397816 is 61879362.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9105 + ... + 11648.

Almost surely, 2^26397816 is an apocalyptic number.

It is an amenable number.

26397816 is an abundant number, since it is smaller than the sum of its proper divisors (40845144).

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

26397816 is a wasteful number, since it uses less digits than its factorization.

26397816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20815 (or 20811 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 26397816 is about 5137.8804968586. The cubic root of 26397816 is about 297.7528993761.

The spelling of 26397816 in words is "twenty-six million, three hundred ninety-seven thousand, eight hundred sixteen".