30142738 has 8 divisors (see below), whose sum is σ = 45245232. Its totient is φ = 15060996.

The previous prime is 30142727. The next prime is 30142747. The reversal of 30142738 is 83724103.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820 + ... + 7807.

It is an arithmetic number, because the mean of its divisors is an integer number (5655654).

Almost surely, 2^30142738 is an apocalyptic number.

30142738 is a deficient number, since it is larger than the sum of its proper divisors (15102494).

30142738 is a wasteful number, since it uses less digits than its factorization.

30142738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10376.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 30142738 is about 5490.2402497523. The cubic root of 30142738 is about 311.2152712551.

The spelling of 30142738 in words is "thirty million, one hundred forty-two thousand, seven hundred thirty-eight".