381618635 has 16 divisors (see below), whose sum is σ = 485380512. Its totient is φ = 287040000.

The previous prime is 381618607. The next prime is 381618637. The reversal of 381618635 is 536816183.

It is not a de Polignac number, because 381618635 - 2¹⁶ = 381553099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381618592 and 381618601.

It is not an unprimeable number, because it can be changed into a prime (381618637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115760 + ... + 119010.

It is an arithmetic number, because the mean of its divisors is an integer number (30336282).

Almost surely, 2^381618635 is an apocalyptic number.

381618635 is a deficient number, since it is larger than the sum of its proper divisors (103761877).

381618635 is a wasteful number, since it uses less digits than its factorization.

381618635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4654.

The product of its digits is 103680, while the sum is 41.

The square root of 381618635 is about 19535.0616840593. The cubic root of 381618635 is about 725.3426109573.

The spelling of 381618635 in words is "three hundred eighty-one million, six hundred eighteen thousand, six hundred thirty-five".