1219438368 has 48 divisors (see below), whose sum is σ = 3556697760. Its totient is φ = 406479168.

The previous prime is 1219438309. The next prime is 1219438387. The reversal of 1219438368 is 8638349121.

1219438368 is a `hidden beast` number, since 121 + 94 + 383 + 68 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704830 + ... + 706557.

It is an arithmetic number, because the mean of its divisors is an integer number (74097870).

Almost surely, 2^1219438368 is an apocalyptic number.

1219438368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1219438368 is an abundant number, since it is smaller than the sum of its proper divisors (2337259392).

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

1219438368 is a wasteful number, since it uses less digits than its factorization.

1219438368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411406 (or 1411392 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 1219438368 is about 34920.4577289588. The cubic root of 1219438368 is about 1068.3657376346.

The spelling of 1219438368 in words is "one billion, two hundred nineteen million, four hundred thirty-eight thousand, three hundred sixty-eight".