220646379 has 12 divisors (see below), whose sum is σ = 301552568. Its totient is φ = 143506560.

The previous prime is 220646359. The next prime is 220646389. The reversal of 220646379 is 973646022.

It is not a de Polignac number, because 220646379 - 2¹¹ = 220644331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220646329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16834 + ... + 26919.

Almost surely, 2^220646379 is an apocalyptic number.

220646379 is a deficient number, since it is larger than the sum of its proper divisors (80906189).

220646379 is an equidigital number, since it uses as much as digits as its factorization.

220646379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43838 (or 43797 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 220646379 is about 14854.1704244970. The cubic root of 220646379 is about 604.2717179791.

The spelling of 220646379 in words is "two hundred twenty million, six hundred forty-six thousand, three hundred seventy-nine".