381680936 has 32 divisors (see below), whose sum is σ = 880803840. Its totient is φ = 150994368.

The previous prime is 381680921. The next prime is 381680939. The reversal of 381680936 is 639086183.

It is not an unprimeable number, because it can be changed into a prime (381680939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261416 + ... + 262871.

It is an arithmetic number, because the mean of its divisors is an integer number (27525120).

Almost surely, 2^381680936 is an apocalyptic number.

It is an amenable number.

381680936 is an abundant number, since it is smaller than the sum of its proper divisors (499122904).

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

381680936 is a wasteful number, since it uses less digits than its factorization.

381680936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524313 (or 524309 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 381680936 is about 19536.6562133851. The cubic root of 381680936 is about 725.3820806503.

The spelling of 381680936 in words is "three hundred eighty-one million, six hundred eighty thousand, nine hundred thirty-six".