381155328 has 192 divisors, whose sum is σ = 1157738400. Its totient is φ = 123863040.

The previous prime is 381155303. The next prime is 381155347. The reversal of 381155328 is 823551183.

381155328 is a `hidden beast` number, since 3 + 8 + 115 + 532 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

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 = 381155292 and 381155301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3373000 + ... + 3373112.

Almost surely, 2^381155328 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 381155328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578869200).

381155328 is an abundant number, since it is smaller than the sum of its proper divisors (776583072).

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

381155328 is a wasteful number, since it uses less digits than its factorization.

381155328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 179 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 381155328 is about 19523.1997377479. The cubic root of 381155328 is about 725.0489561868.

The spelling of 381155328 in words is "three hundred eighty-one million, one hundred fifty-five thousand, three hundred twenty-eight".