1318217828 has 12 divisors (see below), whose sum is σ = 2308943280. Its totient is φ = 658519752.

The previous prime is 1318217821. The next prime is 1318217843. The reversal of 1318217828 is 8287128131.

1318217828 is nontrivially palindromic in base 7.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

1318217828 is a nontrivial repdigit in base 7.

It is a plaindrome in base 7.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (1318217821) 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 3 ways as a sum of consecutive naturals, for example, 142238 + ... + 151221.

It is an arithmetic number, because the mean of its divisors is an integer number (192411940).

Almost surely, 2^1318217828 is an apocalyptic number.

It is an amenable number.

1318217828 is a deficient number, since it is larger than the sum of its proper divisors (990725452).

1318217828 is a wasteful number, since it uses less digits than its factorization.

1318217828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294586 (or 294584 counting only the distinct ones).

The product of its digits is 43008, while the sum is 41.

The square root of 1318217828 is about 36307.2696301994. The cubic root of 1318217828 is about 1096.4674079067.

The spelling of 1318217828 in words is "one billion, three hundred eighteen million, two hundred seventeen thousand, eight hundred twenty-eight".