2281638072 has 64 divisors (see below), whose sum is σ = 6533268480. Its totient is φ = 650466432.

The previous prime is 2281638061. The next prime is 2281638091. The reversal of 2281638072 is 2708361822.

It is a self number, because there is not a number n which added to its sum of digits gives 2281638072.

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, 63118 + ... + 92450.

It is an arithmetic number, because the mean of its divisors is an integer number (102082320).

Almost surely, 2^2281638072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2281638072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3266634240).

2281638072 is an abundant number, since it is smaller than the sum of its proper divisors (4251630408).

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

2281638072 is a wasteful number, since it uses less digits than its factorization.

2281638072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29812 (or 29808 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 2281638072 is about 47766.4952869687. The cubic root of 2281638072 is about 1316.4839992561.

Adding to 2281638072 its reverse (2708361822), we get a palindrome (4989999894).

The spelling of 2281638072 in words is "two billion, two hundred eighty-one million, six hundred thirty-eight thousand, seventy-two".