1085802990 has 16 divisors (see below), whose sum is σ = 2605927248. Its totient is φ = 289547456.

The previous prime is 1085802983. The next prime is 1085803001. The reversal of 1085802990 is 992085801.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 18096687 + ... + 18096746.

It is an arithmetic number, because the mean of its divisors is an integer number (162870453).

Almost surely, 2^1085802990 is an apocalyptic number.

1085802990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1085802990 is an abundant number, since it is smaller than the sum of its proper divisors (1520124258).

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

1085802990 is a wasteful number, since it uses less digits than its factorization.

1085802990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36193443.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 1085802990 is about 32951.5248509079. The cubic root of 1085802990 is about 1027.8198742425.

The spelling of 1085802990 in words is "one billion, eighty-five million, eight hundred two thousand, nine hundred ninety".