1219543968 has 96 divisors (see below), whose sum is σ = 3375267840. Its totient is φ = 384986880.

The previous prime is 1219543907. The next prime is 1219543981. The reversal of 1219543968 is 8693459121.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

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 15 ways as a sum of consecutive naturals, for example, 135513 + ... + 144231.

It is an arithmetic number, because the mean of its divisors is an integer number (35159040).

Almost surely, 2^1219543968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1219543968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1687633920).

1219543968 is an abundant number, since it is smaller than the sum of its proper divisors (2155723872).

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

1219543968 is a wasteful number, since it uses less digits than its factorization.

1219543968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8810 (or 8802 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 1219543968 is about 34921.9697038984. The cubic root of 1219543968 is about 1068.3965759200.

The spelling of 1219543968 in words is "one billion, two hundred nineteen million, five hundred forty-three thousand, nine hundred sixty-eight".