1028815818 has 8 divisors (see below), whose sum is σ = 2057631648. Its totient is φ = 342938604.

The previous prime is 1028815769. The next prime is 1028815841. The reversal of 1028815818 is 8185188201.

It is a sphenic number, since it is the product of 3 distinct primes.

1028815818 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1028815818.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85734646 + ... + 85734657.

It is an arithmetic number, because the mean of its divisors is an integer number (257203956).

Almost surely, 2^1028815818 is an apocalyptic number.

1028815818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1028815818 is a wasteful number, since it uses less digits than its factorization.

1028815818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171469308.

The product of its (nonzero) digits is 40960, while the sum is 42.

The square root of 1028815818 is about 32075.1588928255. The cubic root of 1028815818 is about 1009.5144606073.

It can be divided in two parts, 10288 and 15818, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 1028815818 in words is "one billion, twenty-eight million, eight hundred fifteen thousand, eight hundred eighteen".