26390398 has 16 divisors (see below), whose sum is σ = 40793760. Its totient is φ = 12794976.

The previous prime is 26390387. The next prime is 26390417. The reversal of 26390398 is 89309362.

It is a self number, because there is not a number n which added to its sum of digits gives 26390398.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36868 + ... + 37576.

It is an arithmetic number, because the mean of its divisors is an integer number (2549610).

Almost surely, 2^26390398 is an apocalyptic number.

26390398 is a deficient number, since it is larger than the sum of its proper divisors (14403362).

26390398 is a wasteful number, since it uses less digits than its factorization.

26390398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

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

The square root of 26390398 is about 5137.1585531303. The cubic root of 26390398 is about 297.7250064382.

The spelling of 26390398 in words is "twenty-six million, three hundred ninety thousand, three hundred ninety-eight".