26685389 has 4 divisors (see below), whose sum is σ = 27546240. Its totient is φ = 25824540.

The previous prime is 26685371. The next prime is 26685397. The reversal of 26685389 is 98358662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26685389 - 2¹² = 26681293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26685319) 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, 430379 + ... + 430440.

It is an arithmetic number, because the mean of its divisors is an integer number (6886560).

Almost surely, 2^26685389 is an apocalyptic number.

It is an amenable number.

26685389 is a deficient number, since it is larger than the sum of its proper divisors (860851).

26685389 is an equidigital number, since it uses as much as digits as its factorization.

26685389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860850.

The product of its digits is 622080, while the sum is 47.

The square root of 26685389 is about 5165.7902590020. The cubic root of 26685389 is about 298.8302187084.

The spelling of 26685389 in words is "twenty-six million, six hundred eighty-five thousand, three hundred eighty-nine".