381626 has 8 divisors (see below), whose sum is σ = 654240. Its totient is φ = 163548.

The previous prime is 381607. The next prime is 381629. The reversal of 381626 is 626183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 381595 and 381604.

It is not an unprimeable number, because it can be changed into a prime (381629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13616 + ... + 13643.

It is an arithmetic number, because the mean of its divisors is an integer number (81780).

2³⁸¹⁶²⁶ is an apocalyptic number.

381626 is a deficient number, since it is larger than the sum of its proper divisors (272614).

381626 is a wasteful number, since it uses less digits than its factorization.

381626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27268.

The product of its digits is 1728, while the sum is 26.

The square root of 381626 is about 617.7588526278. The cubic root of 381626 is about 72.5347277146.

The spelling of 381626 in words is "three hundred eighty-one thousand, six hundred twenty-six".