1018085778 has 48 divisors (see below), whose sum is σ = 2327582400. Its totient is φ = 320721120.

The previous prime is 1018085773. The next prime is 1018085819. The reversal of 1018085778 is 8775808101.

1018085778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1018085773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146748 + ... + 153528.

It is an arithmetic number, because the mean of its divisors is an integer number (48491300).

Almost surely, 2^1018085778 is an apocalyptic number.

1018085778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1018085778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1163791200).

1018085778 is an abundant number, since it is smaller than the sum of its proper divisors (1309496622).

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

1018085778 is a wasteful number, since it uses less digits than its factorization.

1018085778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7247 (or 7244 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 45.

The square root of 1018085778 is about 31907.4564639678. The cubic root of 1018085778 is about 1005.9926095630.

The spelling of 1018085778 in words is "one billion, eighteen million, eighty-five thousand, seven hundred seventy-eight".