19628985 has 8 divisors (see below), whose sum is σ = 31406400. Its totient is φ = 10468784.

The previous prime is 19628977. The next prime is 19629023. The reversal of 19628985 is 58982691.

It is a happy number.

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 19628985 - 2³ = 19628977 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654285 + ... + 654314.

It is an arithmetic number, because the mean of its divisors is an integer number (3925800).

Almost surely, 2^19628985 is an apocalyptic number.

19628985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19628985 is a deficient number, since it is larger than the sum of its proper divisors (11777415).

19628985 is a wasteful number, since it uses less digits than its factorization.

19628985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308607.

The product of its digits is 311040, while the sum is 48.

The square root of 19628985 is about 4430.4610369577. The cubic root of 19628985 is about 269.7527915609.

The spelling of 19628985 in words is "nineteen million, six hundred twenty-eight thousand, nine hundred eighty-five".