2185698330 has 120 divisors (see below), whose sum is σ = 6243816348. Its totient is φ = 548508672.

The previous prime is 2185698311. The next prime is 2185698331. The reversal of 2185698330 is 338965812.

It is a happy number.

2185698330 is a `hidden beast` number, since 2 + 1 + 8 + 569 + 83 + 3 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 2016099801 + 169598529 = 44901^2 + 13023^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2185698331) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 229422 + ... + 238758.

Almost surely, 2^2185698330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2185698330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3121908174).

2185698330 is an abundant number, since it is smaller than the sum of its proper divisors (4058118018).

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

2185698330 is a wasteful number, since it uses less digits than its factorization.

2185698330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9390 (or 9364 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 2185698330 is about 46751.4527047021. The cubic root of 2185698330 is about 1297.7670404955.

The spelling of 2185698330 in words is "two billion, one hundred eighty-five million, six hundred ninety-eight thousand, three hundred thirty".