26129980 has 12 divisors (see below), whose sum is σ = 54873000. Its totient is φ = 10451984.

The previous prime is 26129963. The next prime is 26130011. The reversal of 26129980 is 8992162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653230 + ... + 653269.

It is an arithmetic number, because the mean of its divisors is an integer number (4572750).

Almost surely, 2^26129980 is an apocalyptic number.

26129980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26129980 is an abundant number, since it is smaller than the sum of its proper divisors (28743020).

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

26129980 is a wasteful number, since it uses less digits than its factorization.

26129980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306508 (or 1306506 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 26129980 is about 5111.7492113757. The cubic root of 26129980 is about 296.7424598389.

The spelling of 26129980 in words is "twenty-six million, one hundred twenty-nine thousand, nine hundred eighty".