26290440 has 128 divisors (see below), whose sum is σ = 95644800. Its totient is φ = 6370560.

The previous prime is 26290421. The next prime is 26290447. The reversal of 26290440 is 4409262.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26290447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10774 + ... + 12986.

It is an arithmetic number, because the mean of its divisors is an integer number (747225).

Almost surely, 2^26290440 is an apocalyptic number.

26290440 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 26290440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47822400).

26290440 is an abundant number, since it is smaller than the sum of its proper divisors (69354360).

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

26290440 is a wasteful number, since it uses less digits than its factorization.

26290440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244 (or 2234 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 26290440 is about 5127.4204040628. The cubic root of 26290440 is about 297.3486366048.

The spelling of 26290440 in words is "twenty-six million, two hundred ninety thousand, four hundred forty".