26799980 has 48 divisors (see below), whose sum is σ = 58078944. Its totient is φ = 10383360.

The previous prime is 26799977. The next prime is 26799989. The reversal of 26799980 is 8999762.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26799989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138764 + ... + 138956.

It is an arithmetic number, because the mean of its divisors is an integer number (1209978).

Almost surely, 2^26799980 is an apocalyptic number.

26799980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26799980 is an abundant number, since it is smaller than the sum of its proper divisors (31278964).

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

26799980 is a wasteful number, since it uses less digits than its factorization.

26799980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 26799980 is about 5176.8697105490. The cubic root of 26799980 is about 299.2573482635.

The spelling of 26799980 in words is "twenty-six million, seven hundred ninety-nine thousand, nine hundred eighty".