1720438479 has 12 divisors (see below), whose sum is σ = 2593124976. Its totient is φ = 1097091072.

The previous prime is 1720438457. The next prime is 1720438501. The reversal of 1720438479 is 9748340271.

1720438479 is a `hidden beast` number, since 172 + 0 + 4 + 3 + 8 + 479 = 666.

It is an interprime number because it is at equal distance from previous prime (1720438457) and next prime (1720438501).

It is not a de Polignac number, because 1720438479 - 2¹⁶ = 1720372943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720438409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4155442 + ... + 4155855.

It is an arithmetic number, because the mean of its divisors is an integer number (216093748).

Almost surely, 2^1720438479 is an apocalyptic number.

1720438479 is a deficient number, since it is larger than the sum of its proper divisors (872686497).

1720438479 is a wasteful number, since it uses less digits than its factorization.

1720438479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8311326 (or 8311323 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 1720438479 is about 41478.1687035481. The cubic root of 1720438479 is about 1198.2470885814.

The spelling of 1720438479 in words is "one billion, seven hundred twenty million, four hundred thirty-eight thousand, four hundred seventy-nine".