30039145 has 16 divisors (see below), whose sum is σ = 36939600. Its totient is φ = 23443200.

The previous prime is 30039131. The next prime is 30039199. The reversal of 30039145 is 54193003.

It can be written as a sum of positive squares in 8 ways, for example, as 5308416 + 24730729 = 2304^2 + 4973^2 .

It is not a de Polignac number, because 30039145 - 2⁹ = 30038633 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 45115 + ... + 45775.

It is an arithmetic number, because the mean of its divisors is an integer number (2308725).

Almost surely, 2^30039145 is an apocalyptic number.

It is an amenable number.

30039145 is a deficient number, since it is larger than the sum of its proper divisors (6900455).

30039145 is a wasteful number, since it uses less digits than its factorization.

30039145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 30039145 is about 5480.7978433801. The cubic root of 30039145 is about 310.8583392080.

The spelling of 30039145 in words is "thirty million, thirty-nine thousand, one hundred forty-five".