26315993 has 16 divisors (see below), whose sum is σ = 29852160. Its totient is φ = 22982400.

The previous prime is 26315981. The next prime is 26315999. The reversal of 26315993 is 39951362.

It is a cyclic number.

It is not a de Polignac number, because 26315993 - 2⁴ = 26315977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26315999) 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, 77921 + ... + 78257.

It is an arithmetic number, because the mean of its divisors is an integer number (1865760).

Almost surely, 2^26315993 is an apocalyptic number.

It is an amenable number.

26315993 is a deficient number, since it is larger than the sum of its proper divisors (3536167).

26315993 is a wasteful number, since it uses less digits than its factorization.

26315993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608.

The product of its digits is 43740, while the sum is 38.

The square root of 26315993 is about 5129.9115976789. The cubic root of 26315993 is about 297.4449414386. Note that the first 3 decimals are identical.

The spelling of 26315993 in words is "twenty-six million, three hundred fifteen thousand, nine hundred ninety-three".