1161108990 has 48 divisors (see below), whose sum is σ = 3020565600. Its totient is φ = 309456576.

The previous prime is 1161108983. The next prime is 1161109031. The reversal of 1161108990 is 998011611.

It is a congruent number.

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, 310351 + ... + 314069.

It is an arithmetic number, because the mean of its divisors is an integer number (62928450).

Almost surely, 2^1161108990 is an apocalyptic number.

1161108990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161108990 is an abundant number, since it is smaller than the sum of its proper divisors (1859456610).

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

1161108990 is a wasteful number, since it uses less digits than its factorization.

1161108990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7201 (or 7198 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 36.

The square root of 1161108990 is about 34075.0493763399. The cubic root of 1161108990 is about 1051.0523055757.

The spelling of 1161108990 in words is "one billion, one hundred sixty-one million, one hundred eight thousand, nine hundred ninety".