30306939 has 36 divisors (see below), whose sum is σ = 46146744. Its totient is φ = 17681664.

The previous prime is 30306931. The next prime is 30306949. The reversal of 30306939 is 93960303.

It is not a de Polignac number, because 30306939 - 2³ = 30306931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30306931) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 268147 + ... + 268259.

It is an arithmetic number, because the mean of its divisors is an integer number (1281854).

Almost surely, 2^30306939 is an apocalyptic number.

30306939 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

30306939 is a deficient number, since it is larger than the sum of its proper divisors (15839805).

30306939 is a wasteful number, since it uses less digits than its factorization.

30306939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 33.

The square root of 30306939 is about 5505.1738392171. The cubic root of 30306939 is about 311.7793578906.

The spelling of 30306939 in words is "thirty million, three hundred six thousand, nine hundred thirty-nine".