26739240 has 128 divisors (see below), whose sum is σ = 89579520. Its totient is φ = 6329600.

The previous prime is 26739227. The next prime is 26739259. The reversal of 26739240 is 4293762.

It is a Cunningham number, because it is equal to 5171²-1.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61825 + ... + 62255.

It is an arithmetic number, because the mean of its divisors is an integer number (699840).

Almost surely, 2^26739240 is an apocalyptic number.

26739240 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 26739240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44789760).

26739240 is an abundant number, since it is smaller than the sum of its proper divisors (62840280).

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

26739240 is a wasteful number, since it uses less digits than its factorization.

26739240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 26739240 is about 5170.9999033069. Note that the first 4 decimals coincide. The cubic root of 26739240 is about 299.0310963434.

The spelling of 26739240 in words is "twenty-six million, seven hundred thirty-nine thousand, two hundred forty".