26645220 has 288 divisors, whose sum is σ = 103420800. Its totient is φ = 5660928.

The previous prime is 26645207. The next prime is 26645233. The reversal of 26645220 is 2254662.

It is an interprime number because it is at equal distance from previous prime (26645207) and next prime (26645233).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 502714 + ... + 502766.

It is an arithmetic number, because the mean of its divisors is an integer number (359100).

Almost surely, 2^26645220 is an apocalyptic number.

26645220 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 26645220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51710400).

26645220 is an abundant number, since it is smaller than the sum of its proper divisors (76775580).

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

26645220 is a wasteful number, since it uses less digits than its factorization.

26645220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 26645220 is about 5161.9008126852. The cubic root of 26645220 is about 298.6802022945.

Adding to 26645220 its reverse (2254662), we get a palindrome (28899882).

The spelling of 26645220 in words is "twenty-six million, six hundred forty-five thousand, two hundred twenty".