381934872 has 256 divisors, whose sum is σ = 1254528000. Its totient is φ = 106444800.

The previous prime is 381934859. The next prime is 381934873. The reversal of 381934872 is 278439183.

381934872 is a `hidden beast` number, since 3 + 81 + 93 + 487 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381934873) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1584672 + ... + 1584912.

It is an arithmetic number, because the mean of its divisors is an integer number (4900500).

Almost surely, 2^381934872 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 381934872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627264000).

381934872 is an abundant number, since it is smaller than the sum of its proper divisors (872593128).

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

381934872 is a wasteful number, since it uses less digits than its factorization.

381934872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 309 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 381934872 is about 19543.1540954883. The cubic root of 381934872 is about 725.5429128810.

The spelling of 381934872 in words is "three hundred eighty-one million, nine hundred thirty-four thousand, eight hundred seventy-two".