19990606 has 8 divisors (see below), whose sum is σ = 31749840. Its totient is φ = 9407328.

The previous prime is 19990601. The next prime is 19990609. The reversal of 19990606 is 60609991.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19990601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293946 + ... + 294013.

It is an arithmetic number, because the mean of its divisors is an integer number (3968730).

Almost surely, 2^19990606 is an apocalyptic number.

19990606 is a deficient number, since it is larger than the sum of its proper divisors (11759234).

19990606 is a wasteful number, since it uses less digits than its factorization.

19990606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587978.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 19990606 is about 4471.0855505123. The cubic root of 19990606 is about 271.3992562721.

The spelling of 19990606 in words is "nineteen million, nine hundred ninety thousand, six hundred six".