381688870 has 8 divisors (see below), whose sum is σ = 687039984. Its totient is φ = 152675544.

The previous prime is 381688849. The next prime is 381688921. The reversal of 381688870 is 78886183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19084434 + ... + 19084453.

It is an arithmetic number, because the mean of its divisors is an integer number (85879998).

Almost surely, 2^381688870 is an apocalyptic number.

381688870 is a deficient number, since it is larger than the sum of its proper divisors (305351114).

381688870 is a wasteful number, since it uses less digits than its factorization.

381688870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38168894.

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 381688870 is about 19536.8592665249. The cubic root of 381688870 is about 725.3871067869.

The spelling of 381688870 in words is "three hundred eighty-one million, six hundred eighty-eight thousand, eight hundred seventy".