19984290 has 16 divisors (see below), whose sum is σ = 47962368. Its totient is φ = 5329136.

The previous prime is 19984273. The next prime is 19984297. The reversal of 19984290 is 9248991.

It is not an unprimeable number, because it can be changed into a prime (19984297) by changing a digit.

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, 333042 + ... + 333101.

It is an arithmetic number, because the mean of its divisors is an integer number (2997648).

Almost surely, 2^19984290 is an apocalyptic number.

19984290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19984290 is an abundant number, since it is smaller than the sum of its proper divisors (27978078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19984290 is a wasteful number, since it uses less digits than its factorization.

19984290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666153.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 19984290 is about 4470.3791785485. The cubic root of 19984290 is about 271.3706705410.

The spelling of 19984290 in words is "nineteen million, nine hundred eighty-four thousand, two hundred ninety".