19198140 has 96 divisors (see below), whose sum is σ = 58630656. Its totient is φ = 4665600.

The previous prime is 19198139. The next prime is 19198147. The reversal of 19198140 is 4189191.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19198147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117699 + ... + 117861.

It is an arithmetic number, because the mean of its divisors is an integer number (610736).

Almost surely, 2^19198140 is an apocalyptic number.

19198140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19198140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29315328).

19198140 is an abundant number, since it is smaller than the sum of its proper divisors (39432516).

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

19198140 is a wasteful number, since it uses less digits than its factorization.

19198140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 19198140 is about 4381.5682124098. The cubic root of 19198140 is about 267.7645329114.

The spelling of 19198140 in words is "nineteen million, one hundred ninety-eight thousand, one hundred forty".