26401859 has 4 divisors (see below), whose sum is σ = 28802040. Its totient is φ = 24001680.

The previous prime is 26401853. The next prime is 26401873. The reversal of 26401859 is 95810462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26401859 - 2⁸ = 26401603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26401853) 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, 1200074 + ... + 1200095.

It is an arithmetic number, because the mean of its divisors is an integer number (7200510).

Almost surely, 2^26401859 is an apocalyptic number.

26401859 is a deficient number, since it is larger than the sum of its proper divisors (2400181).

26401859 is a wasteful number, since it uses less digits than its factorization.

26401859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400180.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 26401859 is about 5138.2739319737. The cubic root of 26401859 is about 297.7680995417.

The spelling of 26401859 in words is "twenty-six million, four hundred one thousand, eight hundred fifty-nine".