26217493 has 16 divisors (see below), whose sum is σ = 28385280. Its totient is φ = 24154416.

The previous prime is 26217481. The next prime is 26217533. The reversal of 26217493 is 39471262.

It is not a de Polignac number, because 26217493 - 2¹⁷ = 26086421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26217463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85246 + ... + 85552.

It is an arithmetic number, because the mean of its divisors is an integer number (1774080).

Almost surely, 2^26217493 is an apocalyptic number.

26217493 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

26217493 is a deficient number, since it is larger than the sum of its proper divisors (2167787).

26217493 is a wasteful number, since it uses less digits than its factorization.

26217493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its digits is 18144, while the sum is 34.

The square root of 26217493 is about 5120.3020418721. The cubic root of 26217493 is about 297.0733681879.

The spelling of 26217493 in words is "twenty-six million, two hundred seventeen thousand, four hundred ninety-three".