26787720 has 128 divisors (see below), whose sum is σ = 87552000. Its totient is φ = 6531840.

The previous prime is 26787713. The next prime is 26787749. The reversal of 26787720 is 2778762.

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 31 ways as a sum of consecutive naturals, for example, 70491 + ... + 70869.

It is an arithmetic number, because the mean of its divisors is an integer number (684000).

Almost surely, 2^26787720 is an apocalyptic number.

26787720 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 26787720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43776000).

26787720 is an abundant number, since it is smaller than the sum of its proper divisors (60764280).

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

26787720 is a wasteful number, since it uses less digits than its factorization.

26787720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 26787720 is about 5175.6854618495. The cubic root of 26787720 is about 299.2117082457.

The spelling of 26787720 in words is "twenty-six million, seven hundred eighty-seven thousand, seven hundred twenty".