1159020990 has 48 divisors (see below), whose sum is σ = 3044544048. Its totient is φ = 305883648.

The previous prime is 1159020977. The next prime is 1159020997. The reversal of 1159020990 is 990209511.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159020997) 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, 57652 + ... + 75111.

It is an arithmetic number, because the mean of its divisors is an integer number (63428001).

Almost surely, 2^1159020990 is an apocalyptic number.

1159020990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1159020990 is an abundant number, since it is smaller than the sum of its proper divisors (1885523058).

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

1159020990 is a wasteful number, since it uses less digits than its factorization.

1159020990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132873 (or 132870 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 1159020990 is about 34044.3973364194. The cubic root of 1159020990 is about 1050.4218984823.

The spelling of 1159020990 in words is "one billion, one hundred fifty-nine million, twenty thousand, nine hundred ninety".