1018919784 has 16 divisors (see below), whose sum is σ = 2547299520. Its totient is φ = 339639920.

The previous prime is 1018919743. The next prime is 1018919789. The reversal of 1018919784 is 4879198101.

It is not an unprimeable number, because it can be changed into a prime (1018919789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21227472 + ... + 21227519.

It is an arithmetic number, because the mean of its divisors is an integer number (159206220).

Almost surely, 2^1018919784 is an apocalyptic number.

It is an amenable number.

1018919784 is an abundant number, since it is smaller than the sum of its proper divisors (1528379736).

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

1018919784 is a wasteful number, since it uses less digits than its factorization.

1018919784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42455000 (or 42454996 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 48.

The square root of 1018919784 is about 31920.5229280474. The cubic root of 1018919784 is about 1006.2672343846.

The spelling of 1018919784 in words is "one billion, eighteen million, nine hundred nineteen thousand, seven hundred eighty-four".