26427780 has 72 divisors (see below), whose sum is σ = 82142424. Its totient is φ = 6873600.

The previous prime is 26427763. The next prime is 26427799. The reversal of 26427780 is 8772462.

26427780 is a `hidden beast` number, since 2 + 642 + 7 + 7 + 8 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1806336 + 24621444 = 1344^2 + 4962^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5590 + ... + 9170.

It is an arithmetic number, because the mean of its divisors is an integer number (1140867).

Almost surely, 2^26427780 is an apocalyptic number.

26427780 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 26427780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41071212).

26427780 is an abundant number, since it is smaller than the sum of its proper divisors (55714644).

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

26427780 is a wasteful number, since it uses less digits than its factorization.

26427780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637 (or 3632 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 26427780 is about 5140.7956582615. The cubic root of 26427780 is about 297.8655159437.

The spelling of 26427780 in words is "twenty-six million, four hundred twenty-seven thousand, seven hundred eighty".