30071745 has 48 divisors (see below), whose sum is σ = 57657600. Its totient is φ = 14376960.

The previous prime is 30071729. The next prime is 30071747. The reversal of 30071745 is 54717003.

It is not a de Polignac number, because 30071745 - 2⁴ = 30071729 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30071747) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38721 + ... + 39489.

It is an arithmetic number, because the mean of its divisors is an integer number (1201200).

Almost surely, 2^30071745 is an apocalyptic number.

It is an amenable number.

30071745 is a deficient number, since it is larger than the sum of its proper divisors (27585855).

30071745 is a wasteful number, since it uses less digits than its factorization.

30071745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 30071745 is about 5483.7710564902. The cubic root of 30071745 is about 310.9707516185.

Adding to 30071745 its reverse (54717003), we get a palindrome (84788748).

The spelling of 30071745 in words is "thirty million, seventy-one thousand, seven hundred forty-five".