19198172 has 12 divisors (see below), whose sum is σ = 38396400. Its totient is φ = 8227776.

The previous prime is 19198163. The next prime is 19198177. The reversal of 19198172 is 27189191.

19198172 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19198177) 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, 342797 + ... + 342852.

It is an arithmetic number, because the mean of its divisors is an integer number (3199700).

Almost surely, 2^19198172 is an apocalyptic number.

It is an amenable number.

19198172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19198172 is a wasteful number, since it uses less digits than its factorization.

19198172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685660 (or 685658 counting only the distinct ones).

The product of its digits is 9072, while the sum is 38.

The square root of 19198172 is about 4381.5718640689. The cubic root of 19198172 is about 267.7646816838.

The spelling of 19198172 in words is "nineteen million, one hundred ninety-eight thousand, one hundred seventy-two".