381871128 has 32 divisors (see below), whose sum is σ = 970862400. Its totient is φ = 125132448.

The previous prime is 381871111. The next prime is 381871129. The reversal of 381871128 is 821178183.

381871128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381871129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133426 + ... + 136257.

It is an arithmetic number, because the mean of its divisors is an integer number (30339450).

Almost surely, 2^381871128 is an apocalyptic number.

It is an amenable number.

381871128 is an abundant number, since it is smaller than the sum of its proper divisors (588991272).

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

381871128 is a wasteful number, since it uses less digits than its factorization.

381871128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269751 (or 269747 counting only the distinct ones).

The product of its digits is 21504, while the sum is 39.

The square root of 381871128 is about 19541.5231750240. The cubic root of 381871128 is about 725.5025468535.

The spelling of 381871128 in words is "three hundred eighty-one million, eight hundred seventy-one thousand, one hundred twenty-eight".