26380399 has 2 divisors, whose sum is σ = 26380400. Its totient is φ = 26380398.

The previous prime is 26380381. The next prime is 26380433. The reversal of 26380399 is 99308362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26380399 - 2¹¹ = 26378351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26380339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13190199 + 13190200.

It is an arithmetic number, because the mean of its divisors is an integer number (13190200).

Almost surely, 2^26380399 is an apocalyptic number.

26380399 is a deficient number, since it is larger than the sum of its proper divisors (1).

26380399 is an equidigital number, since it uses as much as digits as its factorization.

26380399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 26380399 is about 5136.1852575623. The cubic root of 26380399 is about 297.6874002301.

The spelling of 26380399 in words is "twenty-six million, three hundred eighty thousand, three hundred ninety-nine".