19898368 has 56 divisors (see below), whose sum is σ = 45610272. Its totient is φ = 8503296.

The previous prime is 19898363. The next prime is 19898371. The reversal of 19898368 is 86389891.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (19898363) 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, 57171 + ... + 57517.

Almost surely, 2^19898368 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 19898368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22805136).

19898368 is an abundant number, since it is smaller than the sum of its proper divisors (25711904).

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

19898368 is an frugal number, since it uses more digits than its factorization.

19898368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 356 counting only the distinct ones).

The product of its digits is 746496, while the sum is 52.

The square root of 19898368 is about 4460.7586798660. The cubic root of 19898368 is about 270.9811944849.

The spelling of 19898368 in words is "nineteen million, eight hundred ninety-eight thousand, three hundred sixty-eight".