818622642 has 32 divisors (see below), whose sum is σ = 1701310464. Its totient is φ = 262314000.

The previous prime is 818622631. The next prime is 818622661. The reversal of 818622642 is 246226818.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 818622642.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13513 + ... + 42659.

It is an arithmetic number, because the mean of its divisors is an integer number (53165952).

Almost surely, 2^818622642 is an apocalyptic number.

818622642 is an abundant number, since it is smaller than the sum of its proper divisors (882687822).

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

818622642 is a wasteful number, since it uses less digits than its factorization.

818622642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29334.

The product of its digits is 73728, while the sum is 39.

The square root of 818622642 is about 28611.5823050736. The cubic root of 818622642 is about 935.4658062028.

The spelling of 818622642 in words is "eight hundred eighteen million, six hundred twenty-two thousand, six hundred forty-two".