1705791972 has 12 divisors (see below), whose sum is σ = 3980181296. Its totient is φ = 568597320.

The previous prime is 1705791953. The next prime is 1705791973. The reversal of 1705791972 is 2791975071.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1705791973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71074654 + ... + 71074677.

Almost surely, 2^1705791972 is an apocalyptic number.

1705791972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1705791972 is an abundant number, since it is smaller than the sum of its proper divisors (2274389324).

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

1705791972 is a wasteful number, since it uses less digits than its factorization.

1705791972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142149338 (or 142149336 counting only the distinct ones).

The product of its (nonzero) digits is 277830, while the sum is 48.

The square root of 1705791972 is about 41301.2345093945. The cubic root of 1705791972 is about 1194.8370714420.

The spelling of 1705791972 in words is "one billion, seven hundred five million, seven hundred ninety-one thousand, nine hundred seventy-two".