26491840 has 28 divisors (see below), whose sum is σ = 63084456. Its totient is φ = 10596608.

The previous prime is 26491807. The next prime is 26491841. The reversal of 26491840 is 4819462.

It is a junction number, because it is equal to n+sod(n) for n = 26491796 and 26491805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26491841) 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, 41074 + ... + 41713.

Almost surely, 2^26491840 is an apocalyptic number.

26491840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26491840 is an abundant number, since it is smaller than the sum of its proper divisors (36592616).

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

26491840 is an equidigital number, since it uses as much as digits as its factorization.

26491840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82804 (or 82794 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 26491840 is about 5147.0224402075. The cubic root of 26491840 is about 298.1059935553.

It can be divided in two parts, 2649 and 1840, that added together give a square (4489 = 67²).

The spelling of 26491840 in words is "twenty-six million, four hundred ninety-one thousand, eight hundred forty".