19982728 has 16 divisors (see below), whose sum is σ = 37981980. Its totient is φ = 9854208.

The previous prime is 19982713. The next prime is 19982731. The reversal of 19982728 is 82728991.

It can be written as a sum of positive squares in 2 ways, for example, as 17960644 + 2022084 = 4238^2 + 1422^2 .

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, 16525 + ... + 17692.

Almost surely, 2^19982728 is an apocalyptic number.

It is an amenable number.

19982728 is a deficient number, since it is larger than the sum of its proper divisors (17999252).

19982728 is a wasteful number, since it uses less digits than its factorization.

19982728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34296 (or 34292 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 19982728 is about 4470.2044695964. The cubic root of 19982728 is about 271.3636001199.

The spelling of 19982728 in words is "nineteen million, nine hundred eighty-two thousand, seven hundred twenty-eight".