381951728 has 40 divisors (see below), whose sum is σ = 752184000. Its totient is φ = 187858944.

The previous prime is 381951701. The next prime is 381951749. The reversal of 381951728 is 827159183.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567200 + ... + 567872.

It is an arithmetic number, because the mean of its divisors is an integer number (18804600).

Almost surely, 2^381951728 is an apocalyptic number.

It is an amenable number.

381951728 is a deficient number, since it is larger than the sum of its proper divisors (370232272).

381951728 is a wasteful number, since it uses less digits than its factorization.

381951728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1203 counting only the distinct ones).

The product of its digits is 120960, while the sum is 44.

The square root of 381951728 is about 19543.5853414874. The cubic root of 381951728 is about 725.5535862290.

The spelling of 381951728 in words is "three hundred eighty-one million, nine hundred fifty-one thousand, seven hundred twenty-eight".