1158319440 has 100 divisors (see below), whose sum is σ = 4023037524. Its totient is φ = 308883456.

The previous prime is 1158319417. The next prime is 1158319501. The reversal of 1158319440 is 449138511.

It can be written as a sum of positive squares in 2 ways, for example, as 193098816 + 965220624 = 13896^2 + 31068^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1158319395 and 1158319404.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 82897 + ... + 95856.

Almost surely, 2^1158319440 is an apocalyptic number.

1158319440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1158319440 is an abundant number, since it is smaller than the sum of its proper divisors (2864718084).

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

1158319440 is a wasteful number, since it uses less digits than its factorization.

1158319440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178778 (or 178763 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1158319440 is about 34034.0923193200. The cubic root of 1158319440 is about 1050.2099172140.

The spelling of 1158319440 in words is "one billion, one hundred fifty-eight million, three hundred nineteen thousand, four hundred forty".