381688046 has 16 divisors (see below), whose sum is σ = 611881776. Its totient is φ = 177937536.

The previous prime is 381688037. The next prime is 381688049. The reversal of 381688046 is 640886183.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 381687988 and 381688006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381688049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48821 + ... + 56096.

It is an arithmetic number, because the mean of its divisors is an integer number (38242611).

Almost surely, 2^381688046 is an apocalyptic number.

381688046 is a deficient number, since it is larger than the sum of its proper divisors (230193730).

381688046 is a wasteful number, since it uses less digits than its factorization.

381688046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105043.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 381688046 is about 19536.8381781700. The cubic root of 381688046 is about 725.3865847916.

The spelling of 381688046 in words is "three hundred eighty-one million, six hundred eighty-eight thousand, forty-six".