1812939084 has 240 divisors, whose sum is σ = 5386106880. Its totient is φ = 527005440.

The previous prime is 1812939049. The next prime is 1812939091. The reversal of 1812939084 is 4809392181.

1812939084 is a `hidden beast` number, since 181 + 2 + 9 + 390 + 84 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13233064 + ... + 13233200.

It is an arithmetic number, because the mean of its divisors is an integer number (22442112).

Almost surely, 2^1812939084 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 1812939084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2693053440).

1812939084 is an abundant number, since it is smaller than the sum of its proper divisors (3573167796).

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

1812939084 is a wasteful number, since it uses less digits than its factorization.

1812939084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 1812939084 is about 42578.6223825995. The cubic root of 1812939084 is about 1219.3481880529.

The spelling of 1812939084 in words is "one billion, eight hundred twelve million, nine hundred thirty-nine thousand, eighty-four".