26403863 has 4 divisors (see below), whose sum is σ = 27793560. Its totient is φ = 25014168.

The previous prime is 26403859. The next prime is 26403887. The reversal of 26403863 is 36830462.

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 26403863 - 2² = 26403859 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 (26403823) 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, 694820 + ... + 694857.

It is an arithmetic number, because the mean of its divisors is an integer number (6948390).

Almost surely, 2^26403863 is an apocalyptic number.

26403863 is a deficient number, since it is larger than the sum of its proper divisors (1389697).

26403863 is a wasteful number, since it uses less digits than its factorization.

26403863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389696.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 26403863 is about 5138.4689353931. The cubic root of 26403863 is about 297.7756332558.

The spelling of 26403863 in words is "twenty-six million, four hundred three thousand, eight hundred sixty-three".