30039745 has 16 divisors (see below), whose sum is σ = 37559808. Its totient is φ = 23042880.

The previous prime is 30039733. The next prime is 30039749. The reversal of 30039745 is 54793003.

It is not a de Polignac number, because 30039745 - 2⁷ = 30039617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30039749) 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 15 ways as a sum of consecutive naturals, for example, 11992 + ... + 14278.

It is an arithmetic number, because the mean of its divisors is an integer number (2347488).

Almost surely, 2^30039745 is an apocalyptic number.

It is an amenable number.

30039745 is a deficient number, since it is larger than the sum of its proper divisors (7520063).

30039745 is a wasteful number, since it uses less digits than its factorization.

30039745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 30039745 is about 5480.8525796631. The cubic root of 30039745 is about 310.8604088825.

The spelling of 30039745 in words is "thirty million, thirty-nine thousand, seven hundred forty-five".