381804012 has 72 divisors (see below), whose sum is σ = 1020801600. Its totient is φ = 119989728.

The previous prime is 381804011. The next prime is 381804023. The reversal of 381804012 is 210408183.

It is a super-2 number, since 2×381804012² = 291548607158592288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (381804011) 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 23 ways as a sum of consecutive naturals, for example, 154039 + ... + 156497.

It is an arithmetic number, because the mean of its divisors is an integer number (14177800).

Almost surely, 2^381804012 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 381804012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510400800).

381804012 is an abundant number, since it is smaller than the sum of its proper divisors (638997588).

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

381804012 is a wasteful number, since it uses less digits than its factorization.

381804012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 381804012 is about 19539.8058332216. The cubic root of 381804012 is about 725.4600406445.

It can be divided in two parts, 38 and 1804012, that added together give a triangular number (1804050 = T₁₈₉₉).

The spelling of 381804012 in words is "three hundred eighty-one million, eight hundred four thousand, twelve".