1158990 has 32 divisors (see below), whose sum is σ = 3179520. Its totient is φ = 264864.

The previous prime is 1158977. The next prime is 1158991. The reversal of 1158990 is 998511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2550 + ... + 2969.

It is an arithmetic number, because the mean of its divisors is an integer number (99360).

2^1158990 is an apocalyptic number.

1158990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1158990 is an abundant number, since it is smaller than the sum of its proper divisors (2020530).

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

1158990 is a wasteful number, since it uses less digits than its factorization.

1158990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 1158990 is about 1076.5639785911. The cubic root of 1158990 is about 105.0412536309.

The spelling of 1158990 in words is "one million, one hundred fifty-eight thousand, nine hundred ninety".