2188455360 has 672 divisors, whose sum is σ = 8995940352. Its totient is φ = 440893440.

The previous prime is 2188455299. The next prime is 2188455361. The reversal of 2188455360 is 635548812.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188455361) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 46562857 + ... + 46562903.

It is an arithmetic number, because the mean of its divisors is an integer number (13386816).

Almost surely, 2^2188455360 is an apocalyptic number.

2188455360 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 2188455360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4497970176).

2188455360 is an abundant number, since it is smaller than the sum of its proper divisors (6807484992).

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

2188455360 is a wasteful number, since it uses less digits than its factorization.

2188455360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 2188455360 is about 46780.9294477996. The cubic root of 2188455360 is about 1298.3124770501.

The spelling of 2188455360 in words is "two billion, one hundred eighty-eight million, four hundred fifty-five thousand, three hundred sixty".