381704 has 8 divisors (see below), whose sum is σ = 715710. Its totient is φ = 190848.

The previous prime is 381697. The next prime is 381707. The reversal of 381704 is 407183.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 372100 + 9604 = 610^2 + 98^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 381704.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381704.

It is not an unprimeable number, because it can be changed into a prime (381707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23849 + ... + 23864.

2³⁸¹⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

381704 is a deficient number, since it is larger than the sum of its proper divisors (334006).

381704 is a wasteful number, since it uses less digits than its factorization.

381704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47719 (or 47715 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 381704 is about 617.8219808327. The cubic root of 381704 is about 72.5396691349.

Adding to 381704 its reverse (407183), we get a palindrome (788887).

The spelling of 381704 in words is "three hundred eighty-one thousand, seven hundred four".