2189861700 has 288 divisors, whose sum is σ = 7186206720. Its totient is φ = 511142400.

The previous prime is 2189861693. The next prime is 2189861711. The reversal of 2189861700 is 71689812.

It is a super-3 number, since 3×2189861700³ (a number of 29 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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 95 ways as a sum of consecutive naturals, for example, 7132947 + ... + 7133253.

Almost surely, 2^2189861700 is an apocalyptic number.

2189861700 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 2189861700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3593103360).

2189861700 is an abundant number, since it is smaller than the sum of its proper divisors (4996345020).

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

2189861700 is a wasteful number, since it uses less digits than its factorization.

2189861700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 2189861700 is about 46795.9581587983. The cubic root of 2189861700 is about 1298.5905236624.

The spelling of 2189861700 in words is "two billion, one hundred eighty-nine million, eight hundred sixty-one thousand, seven hundred".