158438193 has 8 divisors (see below), whose sum is σ = 211344000. Its totient is φ = 105578928.

The previous prime is 158438123. The next prime is 158438209. The reversal of 158438193 is 391834851.

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

It is not a de Polignac number, because 158438193 - 2²⁴ = 141660977 is a prime.

It is a super-2 number, since 2×158438193² = 50205322002210498, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (158438123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2713 + ... + 18006.

It is an arithmetic number, because the mean of its divisors is an integer number (26418000).

Almost surely, 2^158438193 is an apocalyptic number.

It is an amenable number.

158438193 is a deficient number, since it is larger than the sum of its proper divisors (52905807).

158438193 is a wasteful number, since it uses less digits than its factorization.

158438193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23271.

The product of its digits is 103680, while the sum is 42.

The square root of 158438193 is about 12587.2234031179. The cubic root of 158438193 is about 541.1113292661. Note that the first 3 decimals are identical.

The spelling of 158438193 in words is "one hundred fifty-eight million, four hundred thirty-eight thousand, one hundred ninety-three".