26445540 has 96 divisors (see below), whose sum is σ = 85567104. Its totient is φ = 6031360.

The previous prime is 26445499. The next prime is 26445541. The reversal of 26445540 is 4554462.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 26445498 and 26445507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26445541) 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, 10042 + ... + 12398.

It is an arithmetic number, because the mean of its divisors is an integer number (891324).

Almost surely, 2^26445540 is an apocalyptic number.

26445540 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 26445540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42783552).

26445540 is an abundant number, since it is smaller than the sum of its proper divisors (59121564).

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

26445540 is a wasteful number, since it uses less digits than its factorization.

26445540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397 (or 2395 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 26445540 is about 5142.5227272225. The cubic root of 26445540 is about 297.9322248763.

The spelling of 26445540 in words is "twenty-six million, four hundred forty-five thousand, five hundred forty".