19317928 has 16 divisors (see below), whose sum is σ = 41395680. Its totient is φ = 8279088.

The previous prime is 19317913. The next prime is 19317941. The reversal of 19317928 is 82971391.

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, 172426 + ... + 172537.

It is an arithmetic number, because the mean of its divisors is an integer number (2587230).

Almost surely, 2^19317928 is an apocalyptic number.

It is an amenable number.

19317928 is an abundant number, since it is smaller than the sum of its proper divisors (22077752).

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

19317928 is a wasteful number, since it uses less digits than its factorization.

19317928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344976 (or 344972 counting only the distinct ones).

The product of its digits is 27216, while the sum is 40.

The square root of 19317928 is about 4395.2164906862. The cubic root of 19317928 is about 268.3202898212.

The spelling of 19317928 in words is "nineteen million, three hundred seventeen thousand, nine hundred twenty-eight".