158728437 has 32 divisors (see below), whose sum is σ = 275010560. Its totient is φ = 88588080.

The previous prime is 158728433. The next prime is 158728457. The reversal of 158728437 is 734827851.

158728437 is a `hidden beast` number, since 1 + 587 + 28 + 43 + 7 = 666.

It is not a de Polignac number, because 158728437 - 2² = 158728433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 158728392 and 158728401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158728433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1639 + ... + 17892.

It is an arithmetic number, because the mean of its divisors is an integer number (8594080).

Almost surely, 2^158728437 is an apocalyptic number.

It is an amenable number.

158728437 is a deficient number, since it is larger than the sum of its proper divisors (116282123).

158728437 is a wasteful number, since it uses less digits than its factorization.

158728437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19590 (or 19584 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 158728437 is about 12598.7474377416. The cubic root of 158728437 is about 541.4415495415.

The spelling of 158728437 in words is "one hundred fifty-eight million, seven hundred twenty-eight thousand, four hundred thirty-seven".