26679980 has 12 divisors (see below), whose sum is σ = 56028000. Its totient is φ = 10671984.

The previous prime is 26679979. The next prime is 26680001. The reversal of 26679980 is 8997662.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 666980 + ... + 667019.

It is an arithmetic number, because the mean of its divisors is an integer number (4669000).

Almost surely, 2^26679980 is an apocalyptic number.

26679980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26679980 is an abundant number, since it is smaller than the sum of its proper divisors (29348020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26679980 is a wasteful number, since it uses less digits than its factorization.

26679980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334008 (or 1334006 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 26679980 is about 5165.2666920499. The cubic root of 26679980 is about 298.8100268614.

The spelling of 26679980 in words is "twenty-six million, six hundred seventy-nine thousand, nine hundred eighty".