158065438 has 4 divisors (see below), whose sum is σ = 237098160. Its totient is φ = 79032718.

The previous prime is 158065433. The next prime is 158065471. The reversal of 158065438 is 834560851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834560851 = 839 ⋅994709.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 158065438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158065433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39516358 + ... + 39516361.

It is an arithmetic number, because the mean of its divisors is an integer number (59274540).

Almost surely, 2^158065438 is an apocalyptic number.

158065438 is a deficient number, since it is larger than the sum of its proper divisors (79032722).

158065438 is an equidigital number, since it uses as much as digits as its factorization.

158065438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79032721.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 158065438 is about 12572.4078043945. The cubic root of 158065438 is about 540.6866413860.

The spelling of 158065438 in words is "one hundred fifty-eight million, sixty-five thousand, four hundred thirty-eight".