1219198013928 has 48 divisors (see below), whose sum is σ = 3302060411520. Its totient is φ = 406391240736.

The previous prime is 1219198013897. The next prime is 1219198013933. The reversal of 1219198013928 is 8293108919121.

It is a happy number.

It is a Cunningham number, because it is equal to 1104173²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4278675 + ... + 4554717.

It is an arithmetic number, because the mean of its divisors is an integer number (68792925240).

Almost surely, 2^{1219198013928} is an apocalyptic number.

1219198013928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1219198013928 is an abundant number, since it is smaller than the sum of its proper divisors (2082862397592).

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

1219198013928 is a wasteful number, since it uses less digits than its factorization.

1219198013928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337398 (or 337391 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 54.

The spelling of 1219198013928 in words is "one trillion, two hundred nineteen billion, one hundred ninety-eight million, thirteen thousand, nine hundred twenty-eight".