2216678400 has 330 divisors, whose sum is σ = 8215777790. Its totient is φ = 590561280.

The previous prime is 2216678389. The next prime is 2216678417. The reversal of 2216678400 is 48766122.

2216678400 is a `hidden beast` number, since 22 + 166 + 78 + 400 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 119771136 + 2096907264 = 10944^2 + 45792^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2073066 + ... + 2074134.

Almost surely, 2^2216678400 is an apocalyptic number.

2216678400 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 2216678400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4107888895).

2216678400 is an abundant number, since it is smaller than the sum of its proper divisors (5999099390).

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

2216678400 is a wasteful number, since it uses less digits than its factorization.

2216678400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 2216678400 is about 47081.6142459028. The cubic root of 2216678400 is about 1303.8698102300.

The spelling of 2216678400 in words is "two billion, two hundred sixteen million, six hundred seventy-eight thousand, four hundred".