3081649212 has 72 divisors (see below), whose sum is σ = 8091174000. Its totient is φ = 1026980208.

The previous prime is 3081649201. The next prime is 3081649213. The reversal of 3081649212 is 2129461803.

3081649212 is a `hidden beast` number, since 3 + 0 + 8 + 1 + 649 + 2 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3081649213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 706414 + ... + 710762.

Almost surely, 2^3081649212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3081649212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4045587000).

3081649212 is an abundant number, since it is smaller than the sum of its proper divisors (5009524788).

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

3081649212 is an frugal number, since it uses more digits than its factorization.

3081649212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386 (or 4354 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 3081649212 is about 55512.6040823163. The cubic root of 3081649212 is about 1455.2169131385.

The spelling of 3081649212 in words is "three billion, eighty-one million, six hundred forty-nine thousand, two hundred twelve".