26313640 has 16 divisors (see below), whose sum is σ = 59205780. Its totient is φ = 10525440.

The previous prime is 26313611. The next prime is 26313641. The reversal of 26313640 is 4631362.

It can be written as a sum of positive squares in 2 ways, for example, as 26193924 + 119716 = 5118^2 + 346^2 .

It is not an unprimeable number, because it can be changed into a prime (26313641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328881 + ... + 328960.

Almost surely, 2^26313640 is an apocalyptic number.

26313640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26313640 is an abundant number, since it is smaller than the sum of its proper divisors (32892140).

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

26313640 is a wasteful number, since it uses less digits than its factorization.

26313640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657852 (or 657848 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 26313640 is about 5129.6822513680. The cubic root of 26313640 is about 297.4360759956.

The spelling of 26313640 in words is "twenty-six million, three hundred thirteen thousand, six hundred forty".