2217738072 has 128 divisors (see below), whose sum is σ = 6217896960. Its totient is φ = 653358720.

The previous prime is 2217738059. The next prime is 2217738073. The reversal of 2217738072 is 2708377122.

It is a self number, because there is not a number n which added to its sum of digits gives 2217738072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217738073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3938863 + ... + 3939425.

It is an arithmetic number, because the mean of its divisors is an integer number (48577320).

Almost surely, 2^2217738072 is an apocalyptic number.

2217738072 is a gapful number since it is divisible by the number (22) 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 2217738072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3108948480).

2217738072 is an abundant number, since it is smaller than the sum of its proper divisors (4000158888).

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

2217738072 is a wasteful number, since it uses less digits than its factorization.

2217738072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 2217738072 is about 47092.8664661645. The cubic root of 2217738072 is about 1304.0775466072.

The spelling of 2217738072 in words is "two billion, two hundred seventeen million, seven hundred thirty-eight thousand, seventy-two".