1982280639 has 8 divisors (see below), whose sum is σ = 2643828912. Its totient is φ = 1321126400.

The previous prime is 1982280623. The next prime is 1982280721. The reversal of 1982280639 is 9360822891.

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

It is a cyclic number.

It is not a de Polignac number, because 1982280639 - 2⁴ = 1982280623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982280539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86562 + ... + 107039.

It is an arithmetic number, because the mean of its divisors is an integer number (330478614).

Almost surely, 2^1982280639 is an apocalyptic number.

1982280639 is a deficient number, since it is larger than the sum of its proper divisors (661548273).

1982280639 is a wasteful number, since it uses less digits than its factorization.

1982280639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197017.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 1982280639 is about 44522.8103223505. The cubic root of 1982280639 is about 1256.1891743724.

The spelling of 1982280639 in words is "one billion, nine hundred eighty-two million, two hundred eighty thousand, six hundred thirty-nine".