1913840144 has 20 divisors (see below), whose sum is σ = 3926187324. Its totient is φ = 900630528.

The previous prime is 1913840119. The next prime is 1913840147. The reversal of 1913840144 is 4410483191.

It can be written as a sum of positive squares in 2 ways, for example, as 1608010000 + 305830144 = 40100^2 + 17488^2 .

It is not an unprimeable number, because it can be changed into a prime (1913840147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3517817 + ... + 3518360.

Almost surely, 2^1913840144 is an apocalyptic number.

It is an amenable number.

1913840144 is an abundant number, since it is smaller than the sum of its proper divisors (2012347180).

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

1913840144 is a wasteful number, since it uses less digits than its factorization.

1913840144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7036202 (or 7036196 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1913840144 is about 43747.4587147642. The cubic root of 1913840144 is about 1241.5624044540.

The spelling of 1913840144 in words is "one billion, nine hundred thirteen million, eight hundred forty thousand, one hundred forty-four".