381736 has 8 divisors (see below), whose sum is σ = 715770. Its totient is φ = 190864.

The previous prime is 381713. The next prime is 381737. The reversal of 381736 is 637183.

It can be written as a sum of positive squares in only one way, i.e., 352836 + 28900 = 594^2 + 170^2 .

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

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (381737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23851 + ... + 23866.

2³⁸¹⁷³⁶ is an apocalyptic number.

It is an amenable number.

381736 is a deficient number, since it is larger than the sum of its proper divisors (334034).

381736 is a wasteful number, since it uses less digits than its factorization.

381736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47723 (or 47719 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 381736 is about 617.8478777175. The cubic root of 381736 is about 72.5416961895.

The spelling of 381736 in words is "three hundred eighty-one thousand, seven hundred thirty-six".