19890498 has 16 divisors (see below), whose sum is σ = 39828096. Its totient is φ = 6622320.

The previous prime is 19890463. The next prime is 19890503. The reversal of 19890498 is 89409891.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6040 + ... + 8732.

It is an arithmetic number, because the mean of its divisors is an integer number (2489256).

Almost surely, 2^19890498 is an apocalyptic number.

19890498 is an abundant number, since it is smaller than the sum of its proper divisors (19937598).

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

19890498 is a wasteful number, since it uses less digits than its factorization.

19890498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 19890498 is about 4459.8764556880. The cubic root of 19890498 is about 270.9454645325.

The spelling of 19890498 in words is "nineteen million, eight hundred ninety thousand, four hundred ninety-eight".