26404220 has 12 divisors (see below), whose sum is σ = 55448904. Its totient is φ = 10561680.

The previous prime is 26404187. The next prime is 26404223. The reversal of 26404220 is 2240462.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1320211 = 26404220 / (2 + 6 + 4 + 0 + 4 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 26404192 and 26404201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26404223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660086 + ... + 660125.

It is an arithmetic number, because the mean of its divisors is an integer number (4620742).

Almost surely, 2^26404220 is an apocalyptic number.

26404220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26404220 is an abundant number, since it is smaller than the sum of its proper divisors (29044684).

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

26404220 is a wasteful number, since it uses less digits than its factorization.

26404220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320220 (or 1320218 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 26404220 is about 5138.5036732496. The cubic root of 26404220 is about 297.7769752996.

Adding to 26404220 its reverse (2240462), we get a palindrome (28644682).

The spelling of 26404220 in words is "twenty-six million, four hundred four thousand, two hundred twenty".