26257791 has 16 divisors (see below), whose sum is σ = 42118400. Its totient is φ = 14214528.

The previous prime is 26257787. The next prime is 26257801. The reversal of 26257791 is 19775262.

It is not a de Polignac number, because 26257791 - 2² = 26257787 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 (26257711) 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, 32506 + ... + 33303.

It is an arithmetic number, because the mean of its divisors is an integer number (2632400).

Almost surely, 2^26257791 is an apocalyptic number.

26257791 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

26257791 is a deficient number, since it is larger than the sum of its proper divisors (15860609).

26257791 is a wasteful number, since it uses less digits than its factorization.

26257791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65838.

The product of its digits is 52920, while the sum is 39.

The square root of 26257791 is about 5124.2356503190. The cubic root of 26257791 is about 297.2254973303.

The spelling of 26257791 in words is "twenty-six million, two hundred fifty-seven thousand, seven hundred ninety-one".