381630 has 16 divisors (see below), whose sum is σ = 915984. Its totient is φ = 101760.

The previous prime is 381629. The next prime is 381631. The reversal of 381630 is 36183.

It is an interprime number because it is at equal distance from previous prime (381629) and next prime (381631).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 381597 and 381606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6331 + ... + 6390.

It is an arithmetic number, because the mean of its divisors is an integer number (57249).

2³⁸¹⁶³⁰ is an apocalyptic number.

381630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381630 is an abundant number, since it is smaller than the sum of its proper divisors (534354).

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

381630 is a wasteful number, since it uses less digits than its factorization.

381630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12731.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 381630 is about 617.7620901286. The cubic root of 381630 is about 72.5349811372.

The spelling of 381630 in words is "three hundred eighty-one thousand, six hundred thirty".