19197798 has 16 divisors (see below), whose sum is σ = 39025776. Its totient is φ = 6294240.

The previous prime is 19197793. The next prime is 19197839. The reversal of 19197798 is 89779191.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19197798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19197793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25861 + ... + 26592.

It is an arithmetic number, because the mean of its divisors is an integer number (2439111).

Almost surely, 2^19197798 is an apocalyptic number.

19197798 is an abundant number, since it is smaller than the sum of its proper divisors (19827978).

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

19197798 is a wasteful number, since it uses less digits than its factorization.

19197798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52519.

The product of its digits is 285768, while the sum is 51.

The square root of 19197798 is about 4381.5291851133. The cubic root of 19197798 is about 267.7629428960.

The spelling of 19197798 in words is "nineteen million, one hundred ninety-seven thousand, seven hundred ninety-eight".