26379640 has 96 divisors (see below), whose sum is σ = 70876080. Its totient is φ = 8805888.

The previous prime is 26379607. The next prime is 26379653. The reversal of 26379640 is 4697362.

It is a self number, because there is not a number n which added to its sum of digits gives 26379640.

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 23 ways as a sum of consecutive naturals, for example, 84124 + ... + 84436.

Almost surely, 2^26379640 is an apocalyptic number.

26379640 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 26379640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35438040).

26379640 is an abundant number, since it is smaller than the sum of its proper divisors (44496440).

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

26379640 is a wasteful number, since it uses less digits than its factorization.

26379640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 26379640 is about 5136.1113695090. Note that the first 3 decimals coincide. The cubic root of 26379640 is about 297.6845452454.

The spelling of 26379640 in words is "twenty-six million, three hundred seventy-nine thousand, six hundred forty".