1158640 has 40 divisors (see below), whose sum is σ = 3080160. Its totient is φ = 397056.

The previous prime is 1158629. The next prime is 1158643. The reversal of 1158640 is 468511.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475 + ... + 1594.

It is an arithmetic number, because the mean of its divisors is an integer number (77004).

2^1158640 is an apocalyptic number.

1158640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1158640 is an abundant number, since it is smaller than the sum of its proper divisors (1921520).

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

1158640 is a wasteful number, since it uses less digits than its factorization.

1158640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089 (or 2083 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1158640 is about 1076.4014121135. The cubic root of 1158640 is about 105.0306788661.

The spelling of 1158640 in words is "one million, one hundred fifty-eight thousand, six hundred forty".