26640943 has 4 divisors (see below), whose sum is σ = 30446800. Its totient is φ = 22835088.

The previous prime is 26640941. The next prime is 26640959. The reversal of 26640943 is 34904662.

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 26640943 - 2¹ = 26640941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26640899 and 26640908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26640941) 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, 1902918 + ... + 1902931.

It is an arithmetic number, because the mean of its divisors is an integer number (7611700).

Almost surely, 2^26640943 is an apocalyptic number.

26640943 is a deficient number, since it is larger than the sum of its proper divisors (3805857).

26640943 is an equidigital number, since it uses as much as digits as its factorization.

26640943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805856.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 26640943 is about 5161.4865106866. The cubic root of 26640943 is about 298.6642203963.

It can be divided in two parts, 266 and 40943, that added together give a square (41209 = 203²).

The spelling of 26640943 in words is "twenty-six million, six hundred forty thousand, nine hundred forty-three".