381881750 has 32 divisors (see below), whose sum is σ = 716040000. Its totient is φ = 152505600.

The previous prime is 381881743. The next prime is 381881783. The reversal of 381881750 is 57188183.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 381881698 and 381881707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305126 + ... + 306374.

It is an arithmetic number, because the mean of its divisors is an integer number (22376250).

Almost surely, 2^381881750 is an apocalyptic number.

381881750 is a deficient number, since it is larger than the sum of its proper divisors (334158250).

381881750 is a wasteful number, since it uses less digits than its factorization.

381881750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489 (or 2479 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 381881750 is about 19541.7949533813. The cubic root of 381881750 is about 725.5092735701.

The spelling of 381881750 in words is "three hundred eighty-one million, eight hundred eighty-one thousand, seven hundred fifty".