1927198242 has 24 divisors (see below), whose sum is σ = 4187574300. Its totient is φ = 640556640.

The previous prime is 1927198237. The next prime is 1927198303. The reversal of 1927198242 is 2428917291.

It can be written as a sum of positive squares in 2 ways, for example, as 1915025121 + 12173121 = 43761^2 + 3489^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147109 + ... + 159672.

Almost surely, 2^1927198242 is an apocalyptic number.

1927198242 is an abundant number, since it is smaller than the sum of its proper divisors (2260376058).

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

1927198242 is a wasteful number, since it uses less digits than its factorization.

1927198242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307138 (or 307135 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1927198242 is about 43899.8660818003. The cubic root of 1927198242 is about 1244.4443022540. Note that the first 3 decimals are identical.

The spelling of 1927198242 in words is "one billion, nine hundred twenty-seven million, one hundred ninety-eight thousand, two hundred forty-two".