30730239 has 32 divisors (see below), whose sum is σ = 49248000. Its totient is φ = 18872352.

The previous prime is 30730223. The next prime is 30730241. The reversal of 30730239 is 93203703.

It is not a de Polignac number, because 30730239 - 2⁴ = 30730223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30330239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18172 + ... + 19790.

It is an arithmetic number, because the mean of its divisors is an integer number (1539000).

Almost surely, 2^30730239 is an apocalyptic number.

30730239 is a deficient number, since it is larger than the sum of its proper divisors (18517761).

30730239 is a wasteful number, since it uses less digits than its factorization.

30730239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684 (or 1678 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 27.

The square root of 30730239 is about 5543.4861774880. The cubic root of 30730239 is about 313.2242028536.

The spelling of 30730239 in words is "thirty million, seven hundred thirty thousand, two hundred thirty-nine".