26866840 has 192 divisors, whose sum is σ = 83119680. Its totient is φ = 7603200.

The previous prime is 26866831. The next prime is 26866843. The reversal of 26866840 is 4866862.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 26866793 and 26866802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26866843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 440410 + ... + 440470.

It is an arithmetic number, because the mean of its divisors is an integer number (432915).

Almost surely, 2^26866840 is an apocalyptic number.

26866840 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 26866840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41559840).

26866840 is an abundant number, since it is smaller than the sum of its proper divisors (56252840).

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

26866840 is a wasteful number, since it uses less digits than its factorization.

26866840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 26866840 is about 5183.3232582967. The cubic root of 26866840 is about 299.5060018139.

The spelling of 26866840 in words is "twenty-six million, eight hundred sixty-six thousand, eight hundred forty".