26442631 has 4 divisors (see below), whose sum is σ = 26455000. Its totient is φ = 26430264.

The previous prime is 26442629. The next prime is 26442641. The reversal of 26442631 is 13624462.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13624462 = 2 ⋅6812231.

It is a cyclic number.

It is not a de Polignac number, because 26442631 - 2¹ = 26442629 is a prime.

It is a super-2 number, since 2×26442631² = 1398425468404322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26442631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26442641) 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, 2061 + ... + 7558.

It is an arithmetic number, because the mean of its divisors is an integer number (6613750).

Almost surely, 2^26442631 is an apocalyptic number.

26442631 is the 2749-th nonagonal number.

26442631 is a deficient number, since it is larger than the sum of its proper divisors (12369).

26442631 is an equidigital number, since it uses as much as digits as its factorization.

26442631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12368.

The product of its digits is 6912, while the sum is 28.

The square root of 26442631 is about 5142.2398816080. The cubic root of 26442631 is about 297.9213003295.

The spelling of 26442631 in words is "twenty-six million, four hundred forty-two thousand, six hundred thirty-one".