26400398 has 4 divisors (see below), whose sum is σ = 39600600. Its totient is φ = 13200198.

The previous prime is 26400397. The next prime is 26400401. The reversal of 26400398 is 89300462.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26400397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6600098 + ... + 6600101.

It is an arithmetic number, because the mean of its divisors is an integer number (9900150).

Almost surely, 2^26400398 is an apocalyptic number.

26400398 is a deficient number, since it is larger than the sum of its proper divisors (13200202).

26400398 is a wasteful number, since it uses less digits than its factorization.

26400398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200201.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 26400398 is about 5138.1317616426. The cubic root of 26400398 is about 297.7626069080.

The spelling of 26400398 in words is "twenty-six million, four hundred thousand, three hundred ninety-eight".