26500240 has 80 divisors (see below), whose sum is σ = 67370688. Its totient is φ = 9635328.

The previous prime is 26500219. The next prime is 26500247. The reversal of 26500240 is 4200562.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (26500247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86167 + ... + 86473.

Almost surely, 2^26500240 is an apocalyptic number.

26500240 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 26500240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33685344).

26500240 is an abundant number, since it is smaller than the sum of its proper divisors (40870448).

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

26500240 is a wasteful number, since it uses less digits than its factorization.

26500240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 26500240 is about 5147.8383813014. The cubic root of 26500240 is about 298.1374979195.

The spelling of 26500240 in words is "twenty-six million, five hundred thousand, two hundred forty".