1100999990 has 16 divisors (see below), whose sum is σ = 2001423600. Its totient is φ = 436039200.

The previous prime is 1100999989. The next prime is 1101000059. The reversal of 1100999990 is 999990011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544040 + ... + 546059.

It is an arithmetic number, because the mean of its divisors is an integer number (125088975).

Almost surely, 2^1100999990 is an apocalyptic number.

1100999990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1100999990 is a deficient number, since it is larger than the sum of its proper divisors (900423610).

1100999990 is a wasteful number, since it uses less digits than its factorization.

1100999990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090207.

The product of its (nonzero) digits is 59049, while the sum is 47.

The square root of 1100999990 is about 33181.3198953869. The cubic root of 1100999990 is about 1032.5928297426.

The spelling of 1100999990 in words is "one billion, one hundred million, nine hundred ninety-nine thousand, nine hundred ninety".