381486 has 32 divisors (see below), whose sum is σ = 903168. Its totient is φ = 105120.

The previous prime is 381481. The next prime is 381487. The reversal of 381486 is 684183.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156 + ... + 1448.

It is an arithmetic number, because the mean of its divisors is an integer number (28224).

2³⁸¹⁴⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451584).

381486 is an abundant number, since it is smaller than the sum of its proper divisors (521682).

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

381486 is a wasteful number, since it uses less digits than its factorization.

381486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336.

The product of its digits is 4608, while the sum is 30.

The square root of 381486 is about 617.6455294099. The cubic root of 381486 is about 72.5258568097.

The spelling of 381486 in words is "three hundred eighty-one thousand, four hundred eighty-six".