30138434 has 8 divisors (see below), whose sum is σ = 45336780. Its totient is φ = 15026176.

The previous prime is 30138413. The next prime is 30138469. The reversal of 30138434 is 43483103.

It can be written as a sum of positive squares in 2 ways, for example, as 29735209 + 403225 = 5453^2 + 635^2 .

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, 20639 + ... + 22050.

Almost surely, 2^30138434 is an apocalyptic number.

30138434 is a deficient number, since it is larger than the sum of its proper divisors (15198346).

30138434 is a wasteful number, since it uses less digits than its factorization.

30138434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43044.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 30138434 is about 5489.8482674843. The cubic root of 30138434 is about 311.2004580212.

The spelling of 30138434 in words is "thirty million, one hundred thirty-eight thousand, four hundred thirty-four".