2189766306 has 32 divisors (see below), whose sum is σ = 5390195328. Its totient is φ = 577520640.

The previous prime is 2189766289. The next prime is 2189766329. The reversal of 2189766306 is 6036679812.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2004735 + ... + 2005826.

It is an arithmetic number, because the mean of its divisors is an integer number (168443604).

Almost surely, 2^2189766306 is an apocalyptic number.

2189766306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2189766306 is an abundant number, since it is smaller than the sum of its proper divisors (3200429022).

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

2189766306 is a wasteful number, since it uses less digits than its factorization.

2189766306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010586.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 2189766306 is about 46794.9388930042. The cubic root of 2189766306 is about 1298.5716671378.

The spelling of 2189766306 in words is "two billion, one hundred eighty-nine million, seven hundred sixty-six thousand, three hundred six".