26545220 has 72 divisors (see below), whose sum is σ = 63081816. Its totient is φ = 9326592.

The previous prime is 26545193. The next prime is 26545231. The reversal of 26545220 is 2254562.

It can be written as a sum of positive squares in 4 ways, for example, as 2116 + 26543104 = 46^2 + 5152^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 26545220.

It is a congruent number.

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, 137444 + ... + 137636.

Almost surely, 2^26545220 is an apocalyptic number.

26545220 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 26545220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31540908).

26545220 is an abundant number, since it is smaller than the sum of its proper divisors (36536596).

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

26545220 is a wasteful number, since it uses less digits than its factorization.

26545220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 26545220 is about 5152.2053530503. The cubic root of 26545220 is about 298.3060831166.

Adding to 26545220 its reverse (2254562), we get a palindrome (28799782).

The spelling of 26545220 in words is "twenty-six million, five hundred forty-five thousand, two hundred twenty".