30158938 has 4 divisors (see below), whose sum is σ = 45238410. Its totient is φ = 15079468.

The previous prime is 30158923. The next prime is 30158983. The reversal of 30158938 is 83985103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 29953729 + 205209 = 5473^2 + 453^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30158897 and 30158906.

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 as a sum of consecutive naturals, namely, 7539733 + ... + 7539736.

Almost surely, 2^30158938 is an apocalyptic number.

30158938 is a deficient number, since it is larger than the sum of its proper divisors (15079472).

30158938 is a wasteful number, since it uses less digits than its factorization.

30158938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15079471.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 30158938 is about 5491.7153968501. The cubic root of 30158938 is about 311.2710147475.

The spelling of 30158938 in words is "thirty million, one hundred fifty-eight thousand, nine hundred thirty-eight".