1158028217 has 8 divisors (see below), whose sum is σ = 1193139720. Its totient is φ = 1123408000.

The previous prime is 1158028177. The next prime is 1158028297. The reversal of 1158028217 is 7128208511.

It can be written as a sum of positive squares in 4 ways, for example, as 395641 + 1157632576 = 629^2 + 34024^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1158028217 - 2⁶ = 1158028153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158028297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118034 + ... + 127467.

It is an arithmetic number, because the mean of its divisors is an integer number (149142465).

Almost surely, 2^1158028217 is an apocalyptic number.

It is an amenable number.

1158028217 is a deficient number, since it is larger than the sum of its proper divisors (35111503).

1158028217 is an equidigital number, since it uses as much as digits as its factorization.

1158028217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245643.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 1158028217 is about 34029.8136492106. The cubic root of 1158028217 is about 1050.1218957502.

The spelling of 1158028217 in words is "one billion, one hundred fifty-eight million, twenty-eight thousand, two hundred seventeen".