381728472 has 128 divisors (see below), whose sum is σ = 1045094400. Its totient is φ = 115734528.

The previous prime is 381728471. The next prime is 381728483. The reversal of 381728472 is 274827183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381728471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2746179 + ... + 2746317.

It is an arithmetic number, because the mean of its divisors is an integer number (8164800).

Almost surely, 2^381728472 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 381728472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522547200).

381728472 is an abundant number, since it is smaller than the sum of its proper divisors (663365928).

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

381728472 is a wasteful number, since it uses less digits than its factorization.

381728472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 341 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 381728472 is about 19537.8727603596. The cubic root of 381728472 is about 725.4121933509.

The spelling of 381728472 in words is "three hundred eighty-one million, seven hundred twenty-eight thousand, four hundred seventy-two".