1831609812 has 12 divisors (see below), whose sum is σ = 4273756256. Its totient is φ = 610536600.

The previous prime is 1831609799. The next prime is 1831609817. The reversal of 1831609812 is 2189061381.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1831609817) 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, 76317064 + ... + 76317087.

Almost surely, 2^1831609812 is an apocalyptic number.

1831609812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1831609812 is an abundant number, since it is smaller than the sum of its proper divisors (2442146444).

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

1831609812 is a wasteful number, since it uses less digits than its factorization.

1831609812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152634158 (or 152634156 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1831609812 is about 42797.3108033671. The cubic root of 1831609812 is about 1223.5197585220.

The spelling of 1831609812 in words is "one billion, eight hundred thirty-one million, six hundred nine thousand, eight hundred twelve".