26722220 has 48 divisors (see below), whose sum is σ = 64581888. Its totient is φ = 9097920.

The previous prime is 26722211. The next prime is 26722231. The reversal of 26722220 is 2222762.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22235 + ... + 23405.

It is an arithmetic number, because the mean of its divisors is an integer number (1345456).

Almost surely, 2^26722220 is an apocalyptic number.

26722220 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 26722220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32290944).

26722220 is an abundant number, since it is smaller than the sum of its proper divisors (37859668).

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

26722220 is a wasteful number, since it uses less digits than its factorization.

26722220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 26722220 is about 5169.3539248150. The cubic root of 26722220 is about 298.9676366802.

Adding to 26722220 its reverse (2222762), we get a palindrome (28944982).

The spelling of 26722220 in words is "twenty-six million, seven hundred twenty-two thousand, two hundred twenty".