19478856 has 16 divisors (see below), whose sum is σ = 48697200. Its totient is φ = 6492944.

The previous prime is 19478839. The next prime is 19478867. The reversal of 19478856 is 65887491.

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, 405786 + ... + 405833.

It is an arithmetic number, because the mean of its divisors is an integer number (3043575).

Almost surely, 2^19478856 is an apocalyptic number.

It is an amenable number.

19478856 is an abundant number, since it is smaller than the sum of its proper divisors (29218344).

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

19478856 is a wasteful number, since it uses less digits than its factorization.

19478856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811628 (or 811624 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 19478856 is about 4413.4856972692. The cubic root of 19478856 is about 269.0633111070.

The spelling of 19478856 in words is "nineteen million, four hundred seventy-eight thousand, eight hundred fifty-six".