1791331872 has 96 divisors (see below), whose sum is σ = 5137945344. Its totient is φ = 541958400.

The previous prime is 1791331853. The next prime is 1791331877. The reversal of 1791331872 is 2781331971.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (1791331877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1024503 + ... + 1026249.

It is an arithmetic number, because the mean of its divisors is an integer number (53520264).

Almost surely, 2^1791331872 is an apocalyptic number.

1791331872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1791331872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2568972672).

1791331872 is an abundant number, since it is smaller than the sum of its proper divisors (3346613472).

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

1791331872 is a wasteful number, since it uses less digits than its factorization.

1791331872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742 (or 2734 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 1791331872 is about 42324.1287210971. The cubic root of 1791331872 is about 1214.4846153640.

Subtracting 1791331872 from its reverse (2781331971), we obtain a palindrome (990000099).

The spelling of 1791331872 in words is "one billion, seven hundred ninety-one million, three hundred thirty-one thousand, eight hundred seventy-two".