2255064440 has 64 divisors (see below), whose sum is σ = 5303232000. Its totient is φ = 861384832.

The previous prime is 2255064431. The next prime is 2255064473. The reversal of 2255064440 is 444605522.

It is a junction number, because it is equal to n+sod(n) for n = 2255064397 and 2255064406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681911 + ... + 685209.

It is an arithmetic number, because the mean of its divisors is an integer number (82863000).

Almost surely, 2^2255064440 is an apocalyptic number.

2255064440 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 2255064440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2651616000).

2255064440 is an abundant number, since it is smaller than the sum of its proper divisors (3048167560).

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

2255064440 is a wasteful number, since it uses less digits than its factorization.

2255064440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4076 (or 4072 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 2255064440 is about 47487.5187812545. The cubic root of 2255064440 is about 1311.3531150100.

Adding to 2255064440 its reverse (444605522), we get a palindrome (2699669962).

The spelling of 2255064440 in words is "two billion, two hundred fifty-five million, sixty-four thousand, four hundred forty".