30390142 has 8 divisors (see below), whose sum is σ = 45608832. Its totient is φ = 15187200.

The previous prime is 30390131. The next prime is 30390161. The reversal of 30390142 is 24109303.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4542 + ... + 9022.

It is an arithmetic number, because the mean of its divisors is an integer number (5701104).

Almost surely, 2^30390142 is an apocalyptic number.

30390142 is a deficient number, since it is larger than the sum of its proper divisors (15218690).

30390142 is a wasteful number, since it uses less digits than its factorization.

30390142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7874.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 30390142 is about 5512.7254602420. The cubic root of 30390142 is about 312.0644111483.

Adding to 30390142 its reverse (24109303), we get a palindrome (54499445).

The spelling of 30390142 in words is "thirty million, three hundred ninety thousand, one hundred forty-two".