30039989 has 6 divisors (see below), whose sum is σ = 34944534. Its totient is φ = 25748520.

The previous prime is 30039983. The next prime is 30040009. The reversal of 30039989 is 98993003.

It can be written as a sum of positive squares in only one way, i.e., 25331089 + 4708900 = 5033^2 + 2170^2 .

It is not a de Polignac number, because 30039989 - 2⁴ = 30039973 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 (30039983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 306482 + ... + 306579.

It is an arithmetic number, because the mean of its divisors is an integer number (5824089).

Almost surely, 2^30039989 is an apocalyptic number.

It is an amenable number.

30039989 is a deficient number, since it is larger than the sum of its proper divisors (4904545).

30039989 is an equidigital number, since it uses as much as digits as its factorization.

30039989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613075 (or 613068 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 30039989 is about 5480.8748389285. The cubic root of 30039989 is about 310.8612505423.

The spelling of 30039989 in words is "thirty million, thirty-nine thousand, nine hundred eighty-nine".