26781798 has 16 divisors (see below), whose sum is σ = 55892736. Its totient is φ = 8539080.

The previous prime is 26781787. The next prime is 26781809. The reversal of 26781798 is 89718762.

It is an interprime number because it is at equal distance from previous prime (26781787) and next prime (26781809).

It is a super-2 number, since 2×26781798² = 1434529408225608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 96898 + ... + 97173.

It is an arithmetic number, because the mean of its divisors is an integer number (3493296).

Almost surely, 2^26781798 is an apocalyptic number.

26781798 is an abundant number, since it is smaller than the sum of its proper divisors (29110938).

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

26781798 is a wasteful number, since it uses less digits than its factorization.

26781798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194099.

The product of its digits is 338688, while the sum is 48.

The square root of 26781798 is about 5175.1133320924. The cubic root of 26781798 is about 299.1896575657.

The spelling of 26781798 in words is "twenty-six million, seven hundred eighty-one thousand, seven hundred ninety-eight".