30390289 has 4 divisors (see below), whose sum is σ = 31438260. Its totient is φ = 29342320.

The previous prime is 30390287. The next prime is 30390317. The reversal of 30390289 is 98209303.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14326225 + 16064064 = 3785^2 + 4008^2 .

It is a cyclic number.

It is not a de Polignac number, because 30390289 - 2¹ = 30390287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30390281) by changing a digit.

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, 523942 + ... + 523999.

It is an arithmetic number, because the mean of its divisors is an integer number (7859565).

Almost surely, 2^30390289 is an apocalyptic number.

It is an amenable number.

30390289 is a deficient number, since it is larger than the sum of its proper divisors (1047971).

30390289 is a wasteful number, since it uses less digits than its factorization.

30390289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047970.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 30390289 is about 5512.7387930139. The cubic root of 30390289 is about 312.0649143092.

The spelling of 30390289 in words is "thirty million, three hundred ninety thousand, two hundred eighty-nine".