19990048 has 48 divisors (see below), whose sum is σ = 43870680. Its totient is φ = 8902656.

The previous prime is 19990043. The next prime is 19990049. The reversal of 19990048 is 84009991.

It can be written as a sum of positive squares in 4 ways, for example, as 12306064 + 7683984 = 3508^2 + 2772^2 .

It is not an unprimeable number, because it can be changed into a prime (19990043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11236 + ... + 12892.

Almost surely, 2^19990048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19990048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21935340).

19990048 is an abundant number, since it is smaller than the sum of its proper divisors (23880632).

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

19990048 is a wasteful number, since it uses less digits than its factorization.

19990048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 19990048 is about 4471.0231491237. The cubic root of 19990048 is about 271.3967310494.

The spelling of 19990048 in words is "nineteen million, nine hundred ninety thousand, forty-eight".