26001891 has 40 divisors (see below), whose sum is σ = 42967584. Its totient is φ = 15586560.

The previous prime is 26001889. The next prime is 26001907. The reversal of 26001891 is 19810062.

It is not a de Polignac number, because 26001891 - 2¹ = 26001889 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (26001821) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31261 + ... + 32081.

Almost surely, 2^26001891 is an apocalyptic number.

26001891 is a deficient number, since it is larger than the sum of its proper divisors (16965693).

26001891 is a wasteful number, since it uses less digits than its factorization.

26001891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 864 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 26001891 is about 5099.2049380271. The cubic root of 26001891 is about 296.2567888206.

The spelling of 26001891 in words is "twenty-six million, one thousand, eight hundred ninety-one".