1000905990 has 64 divisors (see below), whose sum is σ = 2833920000. Its totient is φ = 221397120.

The previous prime is 1000905967. The next prime is 1000906009. The reversal of 1000905990 is 995090001.

1000905990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70365 + ... + 83384.

It is an arithmetic number, because the mean of its divisors is an integer number (44280000).

Almost surely, 2^1000905990 is an apocalyptic number.

1000905990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000905990 is an abundant number, since it is smaller than the sum of its proper divisors (1833014010).

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

1000905990 is a wasteful number, since it uses less digits than its factorization.

1000905990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153797.

The product of its (nonzero) digits is 3645, while the sum is 33.

The square root of 1000905990 is about 31637.0983182719. The cubic root of 1000905990 is about 1000.3019055106.

Adding to 1000905990 its reverse (995090001), we get a palindrome (1995995991).

The spelling of 1000905990 in words is "one billion, nine hundred five thousand, nine hundred ninety".