26226640 has 40 divisors (see below), whose sum is σ = 66522528. Its totient is φ = 9536640.

The previous prime is 26226617. The next prime is 26226653. The reversal of 26226640 is 4662262.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 26226599 and 26226608.

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, 14022 + ... + 15781.

Almost surely, 2^26226640 is an apocalyptic number.

26226640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26226640 is an abundant number, since it is smaller than the sum of its proper divisors (40295888).

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

26226640 is a wasteful number, since it uses less digits than its factorization.

26226640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29827 (or 29821 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 26226640 is about 5121.1951730041. The cubic root of 26226640 is about 297.1079127334.

The spelling of 26226640 in words is "twenty-six million, two hundred twenty-six thousand, six hundred forty".