26493440 has 80 divisors (see below), whose sum is σ = 64817280. Its totient is φ = 10383360.

The previous prime is 26493433. The next prime is 26493449. The reversal of 26493440 is 4439462.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 26493397 and 26493406.

It is not an unprimeable number, because it can be changed into a prime (26493449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202175 + ... + 202305.

It is an arithmetic number, because the mean of its divisors is an integer number (810216).

Almost surely, 2^26493440 is an apocalyptic number.

26493440 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 26493440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32408640).

26493440 is an abundant number, since it is smaller than the sum of its proper divisors (38323840).

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

26493440 is an equidigital number, since it uses as much as digits as its factorization.

26493440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 26493440 is about 5147.1778675309. The cubic root of 26493440 is about 298.1119948999. Note that the first 3 decimals are identical.

The spelling of 26493440 in words is "twenty-six million, four hundred ninety-three thousand, four hundred forty".