158728730 has 8 divisors (see below), whose sum is σ = 285711732. Its totient is φ = 63491488.

The previous prime is 158728721. The next prime is 158728747. The reversal of 158728730 is 37827851.

It can be written as a sum of positive squares in 2 ways, for example, as 155725441 + 3003289 = 12479^2 + 1733^2 .

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

It is an unprimeable 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, 7936427 + ... + 7936446.

Almost surely, 2^158728730 is an apocalyptic number.

158728730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

158728730 is a deficient number, since it is larger than the sum of its proper divisors (126983002).

158728730 is a wasteful number, since it uses less digits than its factorization.

158728730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15872880.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 158728730 is about 12598.7590658763. The cubic root of 158728730 is about 541.4418826939.

The spelling of 158728730 in words is "one hundred fifty-eight million, seven hundred twenty-eight thousand, seven hundred thirty".