26440000 has 70 divisors (see below), whose sum is σ = 65661794. Its totient is φ = 10560000.

The previous prime is 26439989. The next prime is 26440033. The reversal of 26440000 is 4462.

It can be written as a sum of positive squares in 5 ways, for example, as 6512704 + 19927296 = 2552^2 + 4464^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39670 + ... + 40330.

Almost surely, 2^26440000 is an apocalyptic number.

26440000 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 26440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32830897).

26440000 is an abundant number, since it is smaller than the sum of its proper divisors (39221794).

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

26440000 is an frugal number, since it uses more digits than its factorization.

26440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 26440000 is about 5141.9840528730. The cubic root of 26440000 is about 297.9114191022.

Adding to 26440000 its reverse (4462), we get a palindrome (26444462).

The spelling of 26440000 in words is "twenty-six million, four hundred forty thousand".