30158642 has 8 divisors (see below), whose sum is σ = 45299100. Its totient is φ = 15058944.

The previous prime is 30158641. The next prime is 30158651. The reversal of 30158642 is 24685103.

It can be written as a sum of positive squares in 2 ways, for example, as 27237961 + 2920681 = 5219^2 + 1709^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30158641) 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 3 ways as a sum of consecutive naturals, for example, 8267 + ... + 11342.

Almost surely, 2^30158642 is an apocalyptic number.

30158642 is a deficient number, since it is larger than the sum of its proper divisors (15140458).

30158642 is a wasteful number, since it uses less digits than its factorization.

30158642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20380.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 30158642 is about 5491.6884470989. The cubic root of 30158642 is about 311.2699964035.

The spelling of 30158642 in words is "thirty million, one hundred fifty-eight thousand, six hundred forty-two".