381583636 has 24 divisors (see below), whose sum is σ = 768297600. Its totient is φ = 162436512.

The previous prime is 381583571. The next prime is 381583637. The reversal of 381583636 is 636385183.

It is a junction number, because it is equal to n+sod(n) for n = 381583592 and 381583601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381583637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41560 + ... + 49903.

It is an arithmetic number, because the mean of its divisors is an integer number (32012400).

Almost surely, 2^381583636 is an apocalyptic number.

It is an amenable number.

381583636 is an abundant number, since it is smaller than the sum of its proper divisors (386713964).

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

381583636 is a wasteful number, since it uses less digits than its factorization.

381583636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91623 (or 91621 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 381583636 is about 19534.1658639421. The cubic root of 381583636 is about 725.3204360775.

The spelling of 381583636 in words is "three hundred eighty-one million, five hundred eighty-three thousand, six hundred thirty-six".