26389857 has 12 divisors (see below), whose sum is σ = 38102064. Its totient is φ = 16239600.

The previous prime is 26389801. The next prime is 26389861. The reversal of 26389857 is 75898362.

It is not a de Polignac number, because 26389857 - 2⁶ = 26389793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26389757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25519 + ... + 26532.

It is an arithmetic number, because the mean of its divisors is an integer number (3175172).

Almost surely, 2^26389857 is an apocalyptic number.

It is an amenable number.

26389857 is a deficient number, since it is larger than the sum of its proper divisors (11712207).

26389857 is a wasteful number, since it uses less digits than its factorization.

26389857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52080 (or 52067 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 26389857 is about 5137.1058972928. The cubic root of 26389857 is about 297.7229719820.

The spelling of 26389857 in words is "twenty-six million, three hundred eighty-nine thousand, eight hundred fifty-seven".