26419640 has 96 divisors (see below), whose sum is σ = 68251680. Its totient is φ = 9132288.

The previous prime is 26419639. The next prime is 26419643. The reversal of 26419640 is 4691462.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 26419597 and 26419606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26419643) 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 23 ways as a sum of consecutive naturals, for example, 562097 + ... + 562143.

It is an arithmetic number, because the mean of its divisors is an integer number (710955).

Almost surely, 2^26419640 is an apocalyptic number.

26419640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26419640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34125840).

26419640 is an abundant number, since it is smaller than the sum of its proper divisors (41832040).

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

26419640 is a wasteful number, since it uses less digits than its factorization.

26419640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 26419640 is about 5140.0038910491. The cubic root of 26419640 is about 297.8349310279.

The spelling of 26419640 in words is "twenty-six million, four hundred nineteen thousand, six hundred forty".