30072839 has 8 divisors (see below), whose sum is σ = 31761840. Its totient is φ = 28394496.

The previous prime is 30072827. The next prime is 30072853. The reversal of 30072839 is 93827003.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30072839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30072899) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3527 + ... + 8519.

It is an arithmetic number, because the mean of its divisors is an integer number (3970230).

Almost surely, 2^30072839 is an apocalyptic number.

30072839 is a deficient number, since it is larger than the sum of its proper divisors (1689001).

30072839 is a wasteful number, since it uses less digits than its factorization.

30072839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5329.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 30072839 is about 5483.8708044592. The cubic root of 30072839 is about 310.9745225766.

The spelling of 30072839 in words is "thirty million, seventy-two thousand, eight hundred thirty-nine".