158018438 has 4 divisors (see below), whose sum is σ = 237027660. Its totient is φ = 79009218.

The previous prime is 158018431. The next prime is 158018467. The reversal of 158018438 is 834810851.

158018438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158018431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39504608 + ... + 39504611.

It is an arithmetic number, because the mean of its divisors is an integer number (59256915).

Almost surely, 2^158018438 is an apocalyptic number.

158018438 is a deficient number, since it is larger than the sum of its proper divisors (79009222).

158018438 is an equidigital number, since it uses as much as digits as its factorization.

158018438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79009221.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 158018438 is about 12570.5384928411. The cubic root of 158018438 is about 540.6330458802.

The spelling of 158018438 in words is "one hundred fifty-eight million, eighteen thousand, four hundred thirty-eight".