26031220 has 12 divisors (see below), whose sum is σ = 54665604. Its totient is φ = 10412480.

The previous prime is 26031217. The next prime is 26031221. The reversal of 26031220 is 2213062.

It can be written as a sum of positive squares in 2 ways, for example, as 10381284 + 15649936 = 3222^2 + 3956^2 .

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 26031194 and 26031203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26031221) 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, 650761 + ... + 650800.

It is an arithmetic number, because the mean of its divisors is an integer number (4555467).

Almost surely, 2^26031220 is an apocalyptic number.

26031220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26031220 is an abundant number, since it is smaller than the sum of its proper divisors (28634384).

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

26031220 is a wasteful number, since it uses less digits than its factorization.

26031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301570 (or 1301568 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 26031220 is about 5102.0799680130. The cubic root of 26031220 is about 296.3681352158.

Adding to 26031220 its reverse (2213062), we get a palindrome (28244282).

The spelling of 26031220 in words is "twenty-six million, thirty-one thousand, two hundred twenty".