816182638 has 16 divisors (see below), whose sum is σ = 1238786640. Its totient is φ = 403266816.

The previous prime is 816182629. The next prime is 816182657. The reversal of 816182638 is 836281618.

It is a junction number, because it is equal to n+sod(n) for n = 816182594 and 816182603.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 140520 + ... + 146212.

It is an arithmetic number, because the mean of its divisors is an integer number (77424165).

Almost surely, 2^816182638 is an apocalyptic number.

816182638 is a deficient number, since it is larger than the sum of its proper divisors (422604002).

816182638 is a wasteful number, since it uses less digits than its factorization.

816182638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6531.

The product of its digits is 110592, while the sum is 43.

The square root of 816182638 is about 28568.9103397382. The cubic root of 816182638 is about 934.5354581806.

The spelling of 816182638 in words is "eight hundred sixteen million, one hundred eighty-two thousand, six hundred thirty-eight".