19191648 has 48 divisors (see below), whose sum is σ = 57576960. Its totient is φ = 5483136.

The previous prime is 19191629. The next prime is 19191673. The reversal of 19191648 is 84619191.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13608 + ... + 14951.

It is an arithmetic number, because the mean of its divisors is an integer number (1199520).

Almost surely, 2^19191648 is an apocalyptic number.

It is an amenable number.

19191648 is an abundant number, since it is smaller than the sum of its proper divisors (38385312).

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

19191648 is a wasteful number, since it uses less digits than its factorization.

19191648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28579 (or 28571 counting only the distinct ones).

The product of its digits is 15552, while the sum is 39.

The square root of 19191648 is about 4380.8273191259. The cubic root of 19191648 is about 267.7343472905.

The spelling of 19191648 in words is "nineteen million, one hundred ninety-one thousand, six hundred forty-eight".