26257867 has 4 divisors (see below), whose sum is σ = 27639880. Its totient is φ = 24875856.

The previous prime is 26257853. The next prime is 26257873. The reversal of 26257867 is 76875262.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76875262 = 2 ⋅38437631.

It is a cyclic number.

It is not a de Polignac number, because 26257867 - 2⁷ = 26257739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26257807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690978 + ... + 691015.

It is an arithmetic number, because the mean of its divisors is an integer number (6909970).

Almost surely, 2^26257867 is an apocalyptic number.

26257867 is a deficient number, since it is larger than the sum of its proper divisors (1382013).

26257867 is a wasteful number, since it uses less digits than its factorization.

26257867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382012.

The product of its digits is 282240, while the sum is 43.

The square root of 26257867 is about 5124.2430660538. The cubic root of 26257867 is about 297.2257840911.

The spelling of 26257867 in words is "twenty-six million, two hundred fifty-seven thousand, eight hundred sixty-seven".