26638980 has 24 divisors (see below), whose sum is σ = 74589312. Its totient is φ = 7103712.

The previous prime is 26638957. The next prime is 26639009. The reversal of 26638980 is 8983662.

It is a zygodrome in base 7.

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, 221932 + ... + 222051.

It is an arithmetic number, because the mean of its divisors is an integer number (3107888).

Almost surely, 2^26638980 is an apocalyptic number.

26638980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26638980 is an abundant number, since it is smaller than the sum of its proper divisors (47950332).

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

26638980 is a wasteful number, since it uses less digits than its factorization.

26638980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443995 (or 443993 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 26638980 is about 5161.2963487868. The cubic root of 26638980 is about 298.6568846667.

The spelling of 26638980 in words is "twenty-six million, six hundred thirty-eight thousand, nine hundred eighty".