1982517638 has 8 divisors (see below), whose sum is σ = 2973979632. Its totient is φ = 991191096.

The previous prime is 1982517617. The next prime is 1982517643. The reversal of 1982517638 is 8367152891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19631 + ... + 65957.

It is an arithmetic number, because the mean of its divisors is an integer number (371747454).

Almost surely, 2^1982517638 is an apocalyptic number.

1982517638 is a deficient number, since it is larger than the sum of its proper divisors (991461994).

1982517638 is a wasteful number, since it uses less digits than its factorization.

1982517638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67726.

The product of its digits is 725760, while the sum is 50.

The square root of 1982517638 is about 44525.4717886290. The cubic root of 1982517638 is about 1256.2392351808.

The spelling of 1982517638 in words is "one billion, nine hundred eighty-two million, five hundred seventeen thousand, six hundred thirty-eight".