2216857680 has 240 divisors, whose sum is σ = 8061716160. Its totient is φ = 559851264.

The previous prime is 2216857663. The next prime is 2216857697. The reversal of 2216857680 is 867586122.

It is an interprime number because it is at equal distance from previous prime (2216857663) and next prime (2216857697).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 778339 + ... + 781181.

It is an arithmetic number, because the mean of its divisors is an integer number (33590484).

Almost surely, 2^2216857680 is an apocalyptic number.

2216857680 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 2216857680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4030858080).

2216857680 is an abundant number, since it is smaller than the sum of its proper divisors (5844858480).

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

2216857680 is a wasteful number, since it uses less digits than its factorization.

2216857680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903 (or 2872 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 2216857680 is about 47083.5181353305. The cubic root of 2216857680 is about 1303.9049606421.

The spelling of 2216857680 in words is "two billion, two hundred sixteen million, eight hundred fifty-seven thousand, six hundred eighty".