381371328 has 140 divisors (see below), whose sum is σ = 1217681080. Its totient is φ = 117324288.

The previous prime is 381371327. The next prime is 381371351. The reversal of 381371328 is 823173183.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 381371292 and 381371301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381371327) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 64563 + ... + 70221.

It is an arithmetic number, because the mean of its divisors is an integer number (8697722).

Almost surely, 2^381371328 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 381371328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608840540).

381371328 is an abundant number, since it is smaller than the sum of its proper divisors (836309752).

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

381371328 is a wasteful number, since it uses less digits than its factorization.

381371328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5696 (or 5677 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 381371328 is about 19528.7308343374. The cubic root of 381371328 is about 725.1858916115.

The spelling of 381371328 in words is "three hundred eighty-one million, three hundred seventy-one thousand, three hundred twenty-eight".