19730898 has 64 divisors (see below), whose sum is σ = 48729600. Its totient is φ = 5867280.

The previous prime is 19730891. The next prime is 19730899. The reversal of 19730898 is 89803791.

It is not an unprimeable number, because it can be changed into a prime (19730891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34765 + ... + 35327.

It is an arithmetic number, because the mean of its divisors is an integer number (761400).

Almost surely, 2^19730898 is an apocalyptic number.

19730898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19730898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24364800).

19730898 is an abundant number, since it is smaller than the sum of its proper divisors (28998702).

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

19730898 is a wasteful number, since it uses less digits than its factorization.

19730898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 19730898 is about 4441.9475458407. The cubic root of 19730898 is about 270.2188349321.

The spelling of 19730898 in words is "nineteen million, seven hundred thirty thousand, eight hundred ninety-eight".