2186979340 has 48 divisors (see below), whose sum is σ = 5652505152. Its totient is φ = 692142336.

The previous prime is 2186979337. The next prime is 2186979359. The reversal of 2186979340 is 439796812.

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 15 ways as a sum of consecutive naturals, for example, 598999 + ... + 602638.

It is an arithmetic number, because the mean of its divisors is an integer number (117760524).

Almost surely, 2^2186979340 is an apocalyptic number.

2186979340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2186979340 is an abundant number, since it is smaller than the sum of its proper divisors (3465525812).

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

2186979340 is a wasteful number, since it uses less digits than its factorization.

2186979340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201666 (or 1201664 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 2186979340 is about 46765.1509139017. The cubic root of 2186979340 is about 1298.0205259008.

The spelling of 2186979340 in words is "two billion, one hundred eighty-six million, nine hundred seventy-nine thousand, three hundred forty".