158398 has 8 divisors (see below), whose sum is σ = 245880. Its totient is φ = 76440.

The previous prime is 158393. The next prime is 158407. The reversal of 158398 is 893851.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158393) by changing a digit.

158398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308 + ... + 1423.

It is an arithmetic number, because the mean of its divisors is an integer number (30735).

2¹⁵⁸³⁹⁸ is an apocalyptic number.

158398 is a deficient number, since it is larger than the sum of its proper divisors (87482).

158398 is a wasteful number, since it uses less digits than its factorization.

158398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762.

The product of its digits is 8640, while the sum is 34.

The square root of 158398 is about 397.9924622402. The cubic root of 158398 is about 54.1065568568.

It can be divided in two parts, 1583 and 98, that added together give a square (1681 = 41²).

The spelling of 158398 in words is "one hundred fifty-eight thousand, three hundred ninety-eight".