26188197 has 12 divisors (see below), whose sum is σ = 40618656. Its totient is φ = 14964600.

The previous prime is 26188181. The next prime is 26188207. The reversal of 26188197 is 79188162.

It is not a de Polignac number, because 26188197 - 2⁴ = 26188181 is a prime.

It is a super-2 number, since 2×26188197² = 1371643324221618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26188117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88929 + ... + 89222.

It is an arithmetic number, because the mean of its divisors is an integer number (3384888).

Almost surely, 2^26188197 is an apocalyptic number.

It is an amenable number.

26188197 is a deficient number, since it is larger than the sum of its proper divisors (14430459).

26188197 is a wasteful number, since it uses less digits than its factorization.

26188197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178168 (or 178161 counting only the distinct ones).

The product of its digits is 48384, while the sum is 42.

The square root of 26188197 is about 5117.4404735180. The cubic root of 26188197 is about 296.9626748546.

The spelling of 26188197 in words is "twenty-six million, one hundred eighty-eight thousand, one hundred ninety-seven".