1158432638 has 8 divisors (see below), whose sum is σ = 1895617080. Its totient is φ = 526560280.

The previous prime is 1158432619. The next prime is 1158432661. The reversal of 1158432638 is 8362348511.

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

It is a junction number, because it is equal to n+sod(n) for n = 1158432595 and 1158432604.

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, 26327993 + ... + 26328036.

It is an arithmetic number, because the mean of its divisors is an integer number (236952135).

Almost surely, 2^1158432638 is an apocalyptic number.

1158432638 is a deficient number, since it is larger than the sum of its proper divisors (737184442).

1158432638 is a wasteful number, since it uses less digits than its factorization.

1158432638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52656042.

The product of its digits is 138240, while the sum is 41.

The square root of 1158432638 is about 34035.7552876383. The cubic root of 1158432638 is about 1050.2441270602.

The spelling of 1158432638 in words is "one billion, one hundred fifty-eight million, four hundred thirty-two thousand, six hundred thirty-eight".