1158218028 has 60 divisors (see below), whose sum is σ = 3303076392. Its totient is φ = 350974080.

The previous prime is 1158218027. The next prime is 1158218051. The reversal of 1158218028 is 8208128511.

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 = 1158217983 and 1158218001.

It is not an unprimeable number, because it can be changed into a prime (1158218027) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 158925 + ... + 166052.

Almost surely, 2^1158218028 is an apocalyptic number.

1158218028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1158218028 is an abundant number, since it is smaller than the sum of its proper divisors (2144858364).

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

1158218028 is a wasteful number, since it uses less digits than its factorization.

1158218028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325004 (or 324993 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 36.

The square root of 1158218028 is about 34032.6024276722. The cubic root of 1158218028 is about 1050.1792673510.

The spelling of 1158218028 in words is "one billion, one hundred fifty-eight million, two hundred eighteen thousand, twenty-eight".