1158440 has 16 divisors (see below), whose sum is σ = 2606580. Its totient is φ = 463360.

The previous prime is 1158427. The next prime is 1158457. The reversal of 1158440 is 448511.

It can be written as a sum of positive squares in 2 ways, for example, as 1110916 + 47524 = 1054^2 + 218^2 .

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14441 + ... + 14520.

2^1158440 is an apocalyptic number.

1158440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1158440 is an abundant number, since it is smaller than the sum of its proper divisors (1448140).

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

1158440 is a wasteful number, since it uses less digits than its factorization.

1158440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28972 (or 28968 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1158440 is about 1076.3085059591. The cubic root of 1158440 is about 105.0246351871.

The spelling of 1158440 in words is "one million, one hundred fifty-eight thousand, four hundred forty".