381650 has 24 divisors (see below), whose sum is σ = 753300. Its totient is φ = 143360.

The previous prime is 381637. The next prime is 381659. The reversal of 381650 is 56183.

It can be written as a sum of positive squares in 6 ways, for example, as 214369 + 167281 = 463^2 + 409^2 .

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381650.

It is not an unprimeable number, because it can be changed into a prime (381659) 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, 626 + ... + 1074.

2³⁸¹⁶⁵⁰ is an apocalyptic number.

381650 is a deficient number, since it is larger than the sum of its proper divisors (371650).

381650 is a wasteful number, since it uses less digits than its factorization.

381650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 381650 is about 617.7782773779. The cubic root of 381650 is about 72.5362482233.

The spelling of 381650 in words is "three hundred eighty-one thousand, six hundred fifty".