26891457 has 8 divisors (see below), whose sum is σ = 35905440. Its totient is φ = 17902560.

The previous prime is 26891443. The next prime is 26891519. The reversal of 26891457 is 75419862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26891457 - 2⁷ = 26891329 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (26891257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3607 + ... + 8172.

It is an arithmetic number, because the mean of its divisors is an integer number (4488180).

Almost surely, 2^26891457 is an apocalyptic number.

It is an amenable number.

26891457 is a deficient number, since it is larger than the sum of its proper divisors (9013983).

26891457 is a wasteful number, since it uses less digits than its factorization.

26891457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12543.

The product of its digits is 120960, while the sum is 42.

The square root of 26891457 is about 5185.6973494411. The cubic root of 26891457 is about 299.5974489727.

The spelling of 26891457 in words is "twenty-six million, eight hundred ninety-one thousand, four hundred fifty-seven".