30724205 has 8 divisors (see below), whose sum is σ = 38472192. Its totient is φ = 23510608.

The previous prime is 30724201. The next prime is 30724237. The reversal of 30724205 is 50242703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30724205 - 2² = 30724201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30724201) 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 7 ways as a sum of consecutive naturals, for example, 133469 + ... + 133698.

It is an arithmetic number, because the mean of its divisors is an integer number (4809024).

Almost surely, 2^30724205 is an apocalyptic number.

It is an amenable number.

30724205 is a deficient number, since it is larger than the sum of its proper divisors (7747987).

30724205 is a wasteful number, since it uses less digits than its factorization.

30724205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267195.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 30724205 is about 5542.9419084093. The cubic root of 30724205 is about 313.2037005881.

Adding to 30724205 its reverse (50242703), we get a palindrome (80966908).

The spelling of 30724205 in words is "thirty million, seven hundred twenty-four thousand, two hundred five".