26197780 has 24 divisors (see below), whose sum is σ = 62875008. Its totient is φ = 8982048.

The previous prime is 26197777. The next prime is 26197783. The reversal of 26197780 is 8779162.

It is an interprime number because it is at equal distance from previous prime (26197777) and next prime (26197783).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26197783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93424 + ... + 93703.

It is an arithmetic number, because the mean of its divisors is an integer number (2619792).

Almost surely, 2^26197780 is an apocalyptic number.

26197780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26197780 is an abundant number, since it is smaller than the sum of its proper divisors (36677228).

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

26197780 is a wasteful number, since it uses less digits than its factorization.

26197780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187143 (or 187141 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 26197780 is about 5118.3766957894. The cubic root of 26197780 is about 296.9988927770.

The spelling of 26197780 in words is "twenty-six million, one hundred ninety-seven thousand, seven hundred eighty".