158628239 has 16 divisors (see below), whose sum is σ = 201811200. Its totient is φ = 123603480.

The previous prime is 158628229. The next prime is 158628299. The reversal of 158628239 is 932826851.

It is not a de Polignac number, because 158628239 - 2²⁰ = 157579663 is a prime.

It is a super-2 number, since 2×158628239² = 50325836416482242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158628239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158628229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17249 + ... + 24794.

It is an arithmetic number, because the mean of its divisors is an integer number (12613200).

Almost surely, 2^158628239 is an apocalyptic number.

158628239 is a deficient number, since it is larger than the sum of its proper divisors (43182961).

158628239 is an equidigital number, since it uses as much as digits as its factorization.

158628239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42075 (or 42061 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 158628239 is about 12594.7703035824. The cubic root of 158628239 is about 541.3275964678.

The spelling of 158628239 in words is "one hundred fifty-eight million, six hundred twenty-eight thousand, two hundred thirty-nine".