26421398 has 16 divisors (see below), whose sum is σ = 40355280. Its totient is φ = 12972000.

The previous prime is 26421377. The next prime is 26421427. The reversal of 26421398 is 89312462.

It is a super-3 number, since 3×26421398³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27608 + ... + 28548.

It is an arithmetic number, because the mean of its divisors is an integer number (2522205).

Almost surely, 2^26421398 is an apocalyptic number.

26421398 is a deficient number, since it is larger than the sum of its proper divisors (13933882).

26421398 is a wasteful number, since it uses less digits than its factorization.

26421398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183.

The product of its digits is 20736, while the sum is 35.

The square root of 26421398 is about 5140.1748997481. The cubic root of 26421398 is about 297.8415369997.

The spelling of 26421398 in words is "twenty-six million, four hundred twenty-one thousand, three hundred ninety-eight".