381006 has 24 divisors (see below), whose sum is σ = 841464. Its totient is φ = 124560.

The previous prime is 381001. The next prime is 381011. The reversal of 381006 is 600183.

381006 = T₂₄ + T₂₅ + ... + T₁₃₁.

It is an interprime number because it is at equal distance from previous prime (381001) and next prime (381011).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 381006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 925 + ... + 1271.

It is an arithmetic number, because the mean of its divisors is an integer number (35061).

2³⁸¹⁰⁰⁶ is an apocalyptic number.

381006 is an abundant number, since it is smaller than the sum of its proper divisors (460458).

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

381006 is a wasteful number, since it uses less digits than its factorization.

381006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 381006 is about 617.2568347131. The cubic root of 381006 is about 72.4954257915.

Adding to 381006 its reverse (600183), we get a palindrome (981189).

The spelling of 381006 in words is "three hundred eighty-one thousand, six".