26640043 has 4 divisors (see below), whose sum is σ = 26672128. Its totient is φ = 26607960.

The previous prime is 26640041. The next prime is 26640073. The reversal of 26640043 is 34004662.

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 26640043 - 2¹ = 26640041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26640041) 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, 14763 + ... + 16468.

It is an arithmetic number, because the mean of its divisors is an integer number (6668032).

Almost surely, 2^26640043 is an apocalyptic number.

26640043 is a deficient number, since it is larger than the sum of its proper divisors (32085).

26640043 is an equidigital number, since it uses as much as digits as its factorization.

26640043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32084.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 26640043 is about 5161.3993257643. The cubic root of 26640043 is about 298.6608571417.

The spelling of 26640043 in words is "twenty-six million, six hundred forty thousand, forty-three".