1999734548 has 24 divisors (see below), whose sum is σ = 4234732992. Its totient is φ = 806615424.

The previous prime is 1999734509. The next prime is 1999734551. The reversal of 1999734548 is 8454379991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2100086 + ... + 2101037.

It is an arithmetic number, because the mean of its divisors is an integer number (176447208).

Almost surely, 2^1999734548 is an apocalyptic number.

It is an amenable number.

1999734548 is an abundant number, since it is smaller than the sum of its proper divisors (2234998444).

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

1999734548 is a wasteful number, since it uses less digits than its factorization.

1999734548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201151 (or 4201149 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 59.

The square root of 1999734548 is about 44718.3916079279. The cubic root of 1999734548 is about 1259.8653060015.

It can be divided in two parts, 19997 and 34548, that added together give a palindrome (54545).

The spelling of 1999734548 in words is "one billion, nine hundred ninety-nine million, seven hundred thirty-four thousand, five hundred forty-eight".