26642643 has 8 divisors (see below), whose sum is σ = 35603088. Its totient is φ = 17721984.

The previous prime is 26642641. The next prime is 26642653. The reversal of 26642643 is 34624662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26642643 - 2¹ = 26642641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26642641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8346 + ... + 11087.

It is an arithmetic number, because the mean of its divisors is an integer number (4450386).

Almost surely, 2^26642643 is an apocalyptic number.

26642643 is a deficient number, since it is larger than the sum of its proper divisors (8960445).

26642643 is a wasteful number, since it uses less digits than its factorization.

26642643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19893.

The product of its digits is 41472, while the sum is 33.

The square root of 26642643 is about 5161.6511892998. The cubic root of 26642643 is about 298.6705730040.

The spelling of 26642643 in words is "twenty-six million, six hundred forty-two thousand, six hundred forty-three".