158438322 has 64 divisors (see below), whose sum is σ = 403872000. Its totient is φ = 45100800.

The previous prime is 158438311. The next prime is 158438327. The reversal of 158438322 is 223834851.

158438322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (158438327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131322 + ... + 132522.

It is an arithmetic number, because the mean of its divisors is an integer number (6310500).

Almost surely, 2^158438322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158438322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201936000).

158438322 is an abundant number, since it is smaller than the sum of its proper divisors (245433678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158438322 is a wasteful number, since it uses less digits than its factorization.

158438322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568 (or 1562 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 158438322 is about 12587.2285273606. The cubic root of 158438322 is about 541.1114761233. Note that the first 3 decimals are identical.

The spelling of 158438322 in words is "one hundred fifty-eight million, four hundred thirty-eight thousand, three hundred twenty-two".