1219558128 has 20 divisors (see below), whose sum is σ = 3150525288. Its totient is φ = 406519360.

The previous prime is 1219558069. The next prime is 1219558129. The reversal of 1219558128 is 8218559121.

It is a self number, because there is not a number n which added to its sum of digits gives 1219558128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219558129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12703683 + ... + 12703778.

Almost surely, 2^1219558128 is an apocalyptic number.

It is an amenable number.

1219558128 is an abundant number, since it is smaller than the sum of its proper divisors (1930967160).

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

1219558128 is a wasteful number, since it uses less digits than its factorization.

1219558128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25407472 (or 25407466 counting only the distinct ones).

The product of its digits is 57600, while the sum is 42.

The square root of 1219558128 is about 34922.1724410152. The cubic root of 1219558128 is about 1068.4007109184.

The spelling of 1219558128 in words is "one billion, two hundred nineteen million, five hundred fifty-eight thousand, one hundred twenty-eight".