19597128 has 16 divisors (see below), whose sum is σ = 48992880. Its totient is φ = 6532368.

The previous prime is 19597093. The next prime is 19597153. The reversal of 19597128 is 82179591.

It is a self number, because there is not a number n which added to its sum of digits gives 19597128.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408250 + ... + 408297.

It is an arithmetic number, because the mean of its divisors is an integer number (3062055).

Almost surely, 2^19597128 is an apocalyptic number.

It is an amenable number.

19597128 is an abundant number, since it is smaller than the sum of its proper divisors (29395752).

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

19597128 is a wasteful number, since it uses less digits than its factorization.

19597128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816556 (or 816552 counting only the distinct ones).

The product of its digits is 45360, while the sum is 42.

The square root of 19597128 is about 4426.8643530156. The cubic root of 19597128 is about 269.6067801422.

The spelling of 19597128 in words is "nineteen million, five hundred ninety-seven thousand, one hundred twenty-eight".