1028391618618 has 48 divisors (see below), whose sum is σ = 2742377654016. Its totient is φ = 271224162720.

The previous prime is 1028391618581. The next prime is 1028391618643. The reversal of 1028391618618 is 8168161938201.

It is a happy number.

1028391618618 is a `hidden beast` number, since 1 + 0 + 2 + 8 + 3 + 9 + 1 + 6 + 18 + 618 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 313915218 + ... + 313918493.

It is an arithmetic number, because the mean of its divisors is an integer number (57132867792).

Almost surely, 2^{1028391618618} is an apocalyptic number.

1028391618618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1028391618618 is an abundant number, since it is smaller than the sum of its proper divisors (1713986035398).

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

1028391618618 is a wasteful number, since it uses less digits than its factorization.

1028391618618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627833739 (or 627833736 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The spelling of 1028391618618 in words is "one trillion, twenty-eight billion, three hundred ninety-one million, six hundred eighteen thousand, six hundred eighteen".