1982728491 has 8 divisors (see below), whose sum is σ = 2677102080. Its totient is φ = 1305086952.

The previous prime is 1982728483. The next prime is 1982728519. The reversal of 1982728491 is 1948272891.

It is a happy number.

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

It is not a de Polignac number, because 1982728491 - 2³ = 1982728483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1982728091) 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, 4182735 + ... + 4183208.

It is an arithmetic number, because the mean of its divisors is an integer number (334637760).

Almost surely, 2^1982728491 is an apocalyptic number.

1982728491 is a deficient number, since it is larger than the sum of its proper divisors (694373589).

1982728491 is an equidigital number, since it uses as much as digits as its factorization.

1982728491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8366025.

The product of its digits is 580608, while the sum is 51.

The square root of 1982728491 is about 44527.8395051905. The cubic root of 1982728491 is about 1256.2837698702.

The spelling of 1982728491 in words is "one billion, nine hundred eighty-two million, seven hundred twenty-eight thousand, four hundred ninety-one".