19390084 has 18 divisors (see below), whose sum is σ = 39473070. Its totient is φ = 8309952.

The previous prime is 19390079. The next prime is 19390087. The reversal of 19390084 is 48009391.

It can be written as a sum of positive squares in only one way, i.e., 13249600 + 6140484 = 3640^2 + 2478^2 .

It is not an unprimeable number, because it can be changed into a prime (19390087) 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 5 ways as a sum of consecutive naturals, for example, 49269 + ... + 49660.

Almost surely, 2^19390084 is an apocalyptic number.

19390084 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19390084 is an abundant number, since it is smaller than the sum of its proper divisors (20082986).

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

19390084 is a wasteful number, since it uses less digits than its factorization.

19390084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98947 (or 98938 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 19390084 is about 4403.4173093178. The cubic root of 19390084 is about 268.6539498839.

The spelling of 19390084 in words is "nineteen million, three hundred ninety thousand, eighty-four".