381712812 has 96 divisors (see below), whose sum is σ = 1021708800. Its totient is φ = 109942272.

The previous prime is 381712801. The next prime is 381712847. The reversal of 381712812 is 218217183.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263073 + ... + 264519.

It is an arithmetic number, because the mean of its divisors is an integer number (10642800).

Almost surely, 2^381712812 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 381712812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510854400).

381712812 is an abundant number, since it is smaller than the sum of its proper divisors (639995988).

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

381712812 is a wasteful number, since it uses less digits than its factorization.

381712812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575 (or 1573 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 381712812 is about 19537.4719961412. The cubic root of 381712812 is about 725.4022734635.

Adding to 381712812 its reverse (218217183), we get a palindrome (599929995).

The spelling of 381712812 in words is "three hundred eighty-one million, seven hundred twelve thousand, eight hundred twelve".