26939857 has 12 divisors (see below), whose sum is σ = 31855476. Its totient is φ = 22710240.

The previous prime is 26939833. The next prime is 26939867. The reversal of 26939857 is 75893962.

It can be written as a sum of positive squares in 2 ways, for example, as 5400976 + 21538881 = 2324^2 + 4641^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26939857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 26939857.

It is not an unprimeable number, because it can be changed into a prime (26939827) 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, 1518 + ... + 7495.

It is an arithmetic number, because the mean of its divisors is an integer number (2654623).

Almost surely, 2^26939857 is an apocalyptic number.

It is an amenable number.

26939857 is a deficient number, since it is larger than the sum of its proper divisors (4915619).

26939857 is an equidigital number, since it uses as much as digits as its factorization.

26939857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9088 (or 9081 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The square root of 26939857 is about 5190.3619334301. The cubic root of 26939857 is about 299.7770825485. Note that the first 3 decimals are identical.

The spelling of 26939857 in words is "twenty-six million, nine hundred thirty-nine thousand, eight hundred fifty-seven".