26181090 has 64 divisors (see below), whose sum is σ = 75196800. Its totient is φ = 6443712.

The previous prime is 26181079. The next prime is 26181101. The reversal of 26181090 is 9018162.

It is an interprime number because it is at equal distance from previous prime (26181079) and next prime (26181101).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220 + ... + 7239.

It is an arithmetic number, because the mean of its divisors is an integer number (1174950).

Almost surely, 2^26181090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26181090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37598400).

26181090 is an abundant number, since it is smaller than the sum of its proper divisors (49015710).

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

26181090 is a wasteful number, since it uses less digits than its factorization.

26181090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7488 (or 7482 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 26181090 is about 5116.7460363008. The cubic root of 26181090 is about 296.9358090025.

The spelling of 26181090 in words is "twenty-six million, one hundred eighty-one thousand, ninety".