26604431 has 4 divisors (see below), whose sum is σ = 30405072. Its totient is φ = 22803792.

The previous prime is 26604421. The next prime is 26604433. The reversal of 26604431 is 13440662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13440662 = 2 ⋅6720331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26604431 is a prime.

It is a super-2 number, since 2×26604431² = 1415591497667522, 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 26604431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26604433) 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, 1900310 + ... + 1900323.

It is an arithmetic number, because the mean of its divisors is an integer number (7601268).

Almost surely, 2^26604431 is an apocalyptic number.

26604431 is a deficient number, since it is larger than the sum of its proper divisors (3800641).

26604431 is an equidigital number, since it uses as much as digits as its factorization.

26604431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800640.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 26604431 is about 5157.9483324283. The cubic root of 26604431 is about 298.5277160493.

The spelling of 26604431 in words is "twenty-six million, six hundred four thousand, four hundred thirty-one".