26155904 has 32 divisors (see below), whose sum is σ = 52550400. Its totient is φ = 12966912.

The previous prime is 26155901. The next prime is 26155931. The reversal of 26155904 is 40955162.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26155901) 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 3 ways as a sum of consecutive naturals, for example, 15452 + ... + 17060.

It is an arithmetic number, because the mean of its divisors is an integer number (1642200).

Almost surely, 2^26155904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26155904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26275200).

26155904 is an abundant number, since it is smaller than the sum of its proper divisors (26394496).

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

26155904 is a wasteful number, since it uses less digits than its factorization.

26155904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 26155904 is about 5114.2843096566. The cubic root of 26155904 is about 296.8405618261.

It can be divided in two parts, 261 and 55904, that added together give a palindrome (56165).

The spelling of 26155904 in words is "twenty-six million, one hundred fifty-five thousand, nine hundred four".