26106640 has 40 divisors (see below), whose sum is σ = 69370560. Its totient is φ = 8950656.

The previous prime is 26106601. The next prime is 26106649. The reversal of 26106640 is 4660162.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (26106649) 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 7 ways as a sum of consecutive naturals, for example, 22750 + ... + 23869.

It is an arithmetic number, because the mean of its divisors is an integer number (1734264).

Almost surely, 2^26106640 is an apocalyptic number.

26106640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26106640 is an abundant number, since it is smaller than the sum of its proper divisors (43263920).

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

26106640 is a wasteful number, since it uses less digits than its factorization.

26106640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46639 (or 46633 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 26106640 is about 5109.4657254942. The cubic root of 26106640 is about 296.6540807409.

The spelling of 26106640 in words is "twenty-six million, one hundred six thousand, six hundred forty".