26434440 has 96 divisors (see below), whose sum is σ = 86912280. Its totient is φ = 6967296.

The previous prime is 26434433. The next prime is 26434459. The reversal of 26434440 is 4443462.

It can be written as a sum of positive squares in 4 ways, for example, as 21846276 + 4588164 = 4674^2 + 2142^2 .

It is a super-2 number, since 2×26434440² = 1397559236227200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34542 + ... + 35298.

Almost surely, 2^26434440 is an apocalyptic number.

26434440 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 26434440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43456140).

26434440 is an abundant number, since it is smaller than the sum of its proper divisors (60477840).

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

26434440 is a wasteful number, since it uses less digits than its factorization.

26434440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 864 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 26434440 is about 5141.4433771072. The cubic root of 26434440 is about 297.8905352947.

The spelling of 26434440 in words is "twenty-six million, four hundred thirty-four thousand, four hundred forty".