26983680 has 72 divisors (see below), whose sum is σ = 86191392. Its totient is φ = 7194624.

The previous prime is 26983679. The next prime is 26983721. The reversal of 26983680 is 8638962.

It is a congruent number.

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, 327 + ... + 7353.

Almost surely, 2^26983680 is an apocalyptic number.

26983680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26983680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43095696).

26983680 is an abundant number, since it is smaller than the sum of its proper divisors (59207712).

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

26983680 is an equidigital number, since it uses as much as digits as its factorization.

26983680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051 (or 7037 counting only the distinct ones).

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

The square root of 26983680 is about 5194.5817925989. The cubic root of 26983680 is about 299.9395433730.

The spelling of 26983680 in words is "twenty-six million, nine hundred eighty-three thousand, six hundred eighty".