26540220 has 96 divisors (see below), whose sum is σ = 87897600. Its totient is φ = 5854464.

The previous prime is 26540219. The next prime is 26540221. The reversal of 26540220 is 2204562.

It is an interprime number because it is at equal distance from previous prime (26540219) and next prime (26540221).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26540221) 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, 11091 + ... + 13269.

It is an arithmetic number, because the mean of its divisors is an integer number (915600).

Almost surely, 2^26540220 is an apocalyptic number.

26540220 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 26540220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43948800).

26540220 is an abundant number, since it is smaller than the sum of its proper divisors (61357380).

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

26540220 is a wasteful number, since it uses less digits than its factorization.

26540220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227 (or 2225 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 26540220 is about 5151.7201010924. The cubic root of 26540220 is about 298.2873525118.

Adding to 26540220 its reverse (2204562), we get a palindrome (28744782).

The spelling of 26540220 in words is "twenty-six million, five hundred forty thousand, two hundred twenty".