19778848 has 24 divisors (see below), whose sum is σ = 40990320. Its totient is φ = 9368640.

The previous prime is 19778821. The next prime is 19778849. The reversal of 19778848 is 84887791.

It is a junction number, because it is equal to n+sod(n) for n = 19778795 and 19778804.

It is not an unprimeable number, because it can be changed into a prime (19778849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15658 + ... + 16873.

It is an arithmetic number, because the mean of its divisors is an integer number (1707930).

Almost surely, 2^19778848 is an apocalyptic number.

It is an amenable number.

19778848 is an abundant number, since it is smaller than the sum of its proper divisors (21211472).

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

19778848 is a wasteful number, since it uses less digits than its factorization.

19778848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32560 (or 32552 counting only the distinct ones).

The product of its digits is 903168, while the sum is 52.

The square root of 19778848 is about 4447.3416779015. The cubic root of 19778848 is about 270.4375529932.

The spelling of 19778848 in words is "nineteen million, seven hundred seventy-eight thousand, eight hundred forty-eight".