2186978630 has 16 divisors (see below), whose sum is σ = 3937373280. Its totient is φ = 874611072.

The previous prime is 2186978531. The next prime is 2186978659. The reversal of 2186978630 is 368796812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35486 + ... + 75054.

It is an arithmetic number, because the mean of its divisors is an integer number (246085830).

Almost surely, 2^2186978630 is an apocalyptic number.

2186978630 is a deficient number, since it is larger than the sum of its proper divisors (1750394650).

2186978630 is a wasteful number, since it uses less digits than its factorization.

2186978630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45103.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 2186978630 is about 46765.1433227783. The cubic root of 2186978630 is about 1298.0203854339.

The spelling of 2186978630 in words is "two billion, one hundred eighty-six million, nine hundred seventy-eight thousand, six hundred thirty".