19778048 has 20 divisors (see below), whose sum is σ = 39518490. Its totient is φ = 9888768.

The previous prime is 19778041. The next prime is 19778053. The reversal of 19778048 is 84087791.

It can be written as a sum of positive squares in only one way, i.e., 19642624 + 135424 = 4432^2 + 368^2 .

It is not an unprimeable number, because it can be changed into a prime (19778041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18803 + ... + 19826.

Almost surely, 2^19778048 is an apocalyptic number.

It is an amenable number.

19778048 is a deficient number, since it is larger than the sum of its proper divisors (19740442).

19778048 is an frugal number, since it uses more digits than its factorization.

19778048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38647 (or 38631 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 19778048 is about 4447.2517356228. The cubic root of 19778048 is about 270.4339067923.

The spelling of 19778048 in words is "nineteen million, seven hundred seventy-eight thousand, forty-eight".