1705990212 has 18 divisors (see below), whose sum is σ = 4312364238. Its totient is φ = 568663392.

The previous prime is 1705990193. The next prime is 1705990243. The reversal of 1705990212 is 2120995071.

It can be written as a sum of positive squares in only one way, i.e., 1682312256 + 23677956 = 41016^2 + 4866^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 47388617 = 1705990212 / (1 + 7 + 0 + 5 + 9 + 9 + 0 + 2 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23694273 + ... + 23694344.

It is an arithmetic number, because the mean of its divisors is an integer number (239575791).

Almost surely, 2^1705990212 is an apocalyptic number.

1705990212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1705990212 is an abundant number, since it is smaller than the sum of its proper divisors (2606374026).

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

1705990212 is a wasteful number, since it uses less digits than its factorization.

1705990212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47388627 (or 47388622 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 1705990212 is about 41303.6343679343. The cubic root of 1705990212 is about 1194.8833559694.

The spelling of 1705990212 in words is "one billion, seven hundred five million, nine hundred ninety thousand, two hundred twelve".