381954 has 8 divisors (see below), whose sum is σ = 763920. Its totient is φ = 127316.

The previous prime is 381949. The next prime is 381977. The reversal of 381954 is 459183.

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

381954 is an admirable number.

It is an unprimeable number.

381954 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31824 + ... + 31835.

It is an arithmetic number, because the mean of its divisors is an integer number (95490).

2³⁸¹⁹⁵⁴ is an apocalyptic number.

381954 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

381954 is a wasteful number, since it uses less digits than its factorization.

381954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63664.

The product of its digits is 4320, while the sum is 30.

The square root of 381954 is about 618.0242713680. The cubic root of 381954 is about 72.5555024853. Note that the first 4 decimals are identical.

Subtracting from 381954 its sum of digits (30), we obtain a square (381924 = 618²).

The spelling of 381954 in words is "three hundred eighty-one thousand, nine hundred fifty-four".