30389947 has 12 divisors (see below), whose sum is σ = 35495040. Its totient is φ = 25942896.

The previous prime is 30389939. The next prime is 30389959. The reversal of 30389947 is 74998303.

It is not a de Polignac number, because 30389947 - 2³ = 30389939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30389147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12454 + ... + 14692.

It is an arithmetic number, because the mean of its divisors is an integer number (2957920).

Almost surely, 2^30389947 is an apocalyptic number.

30389947 is a deficient number, since it is larger than the sum of its proper divisors (5105093).

30389947 is a wasteful number, since it uses less digits than its factorization.

30389947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530 (or 2523 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 30389947 is about 5512.7077738621. The cubic root of 30389947 is about 312.0637436874.

The spelling of 30389947 in words is "thirty million, three hundred eighty-nine thousand, nine hundred forty-seven".