26781330 has 32 divisors (see below), whose sum is σ = 64440000. Its totient is φ = 7123392.

The previous prime is 26781319. The next prime is 26781331. The reversal of 26781330 is 3318762.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (26781331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14076 + ... + 15864.

It is an arithmetic number, because the mean of its divisors is an integer number (2013750).

Almost surely, 2^26781330 is an apocalyptic number.

26781330 is an abundant number, since it is smaller than the sum of its proper divisors (37658670).

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

26781330 is a wasteful number, since it uses less digits than its factorization.

26781330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 26781330 is about 5175.0681154937. The cubic root of 26781330 is about 299.1879148202.

The spelling of 26781330 in words is "twenty-six million, seven hundred eighty-one thousand, three hundred thirty".