1906720212 has 24 divisors (see below), whose sum is σ = 4449874912. Its totient is φ = 635450400.

The previous prime is 1906720201. The next prime is 1906720213. The reversal of 1906720212 is 2120276091.

It is a self number, because there is not a number n which added to its sum of digits gives 1906720212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906720213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66762 + ... + 90942.

Almost surely, 2^1906720212 is an apocalyptic number.

1906720212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1906720212 is an abundant number, since it is smaller than the sum of its proper divisors (2543154700).

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

1906720212 is a wasteful number, since it uses less digits than its factorization.

1906720212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30759 (or 30757 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1906720212 is about 43666.0075115644. The cubic root of 1906720212 is about 1240.0208572628.

The spelling of 1906720212 in words is "one billion, nine hundred six million, seven hundred twenty thousand, two hundred twelve".