26215740 has 36 divisors (see below), whose sum is σ = 79521624. Its totient is φ = 6990816.

The previous prime is 26215729. The next prime is 26215747. The reversal of 26215740 is 4751262.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26215747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72642 + ... + 73001.

It is an arithmetic number, because the mean of its divisors is an integer number (2208934).

Almost surely, 2^26215740 is an apocalyptic number.

26215740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26215740 is an abundant number, since it is smaller than the sum of its proper divisors (53305884).

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

26215740 is a wasteful number, since it uses less digits than its factorization.

26215740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145658 (or 145653 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 26215740 is about 5120.1308577028. The cubic root of 26215740 is about 297.0667468934.

The spelling of 26215740 in words is "twenty-six million, two hundred fifteen thousand, seven hundred forty".