26006440 has 48 divisors (see below), whose sum is σ = 61790580. Its totient is φ = 9849600.

The previous prime is 26006437. The next prime is 26006441. The reversal of 26006440 is 4460062.

It can be written as a sum of positive squares in 2 ways, for example, as 24029604 + 1976836 = 4902^2 + 1406^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26006441) 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, 13540 + ... + 15340.

Almost surely, 2^26006440 is an apocalyptic number.

26006440 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 26006440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30895290).

26006440 is an abundant number, since it is smaller than the sum of its proper divisors (35784140).

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

26006440 is a wasteful number, since it uses less digits than its factorization.

26006440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 26006440 is about 5099.6509684487. The cubic root of 26006440 is about 296.2740644045.

The spelling of 26006440 in words is "twenty-six million, six thousand, four hundred forty".