2189700864 has 180 divisors, whose sum is σ = 7032410616. Its totient is φ = 673671168.

The previous prime is 2189700791. The next prime is 2189700869. The reversal of 2189700864 is 4680079812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189700869) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 265507 + ... + 273629.

Almost surely, 2^2189700864 is an apocalyptic number.

2189700864 is a gapful number since it is divisible by the number (24) 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 2189700864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3516205308).

2189700864 is an abundant number, since it is smaller than the sum of its proper divisors (4842709752).

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

2189700864 is an equidigital number, since it uses as much as digits as its factorization.

2189700864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8164 (or 8141 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 2189700864 is about 46794.2396454948. The cubic root of 2189700864 is about 1298.5587309059.

The spelling of 2189700864 in words is "two billion, one hundred eighty-nine million, seven hundred thousand, eight hundred sixty-four".