30724293 has 16 divisors (see below), whose sum is σ = 42134400. Its totient is φ = 19902720.

The previous prime is 30724289. The next prime is 30724333. The reversal of 30724293 is 39242703.

It is not a de Polignac number, because 30724293 - 2² = 30724289 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30724293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30728293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53713 + ... + 54281.

It is an arithmetic number, because the mean of its divisors is an integer number (2633400).

Almost surely, 2^30724293 is an apocalyptic number.

It is an amenable number.

30724293 is a deficient number, since it is larger than the sum of its proper divisors (11410107).

30724293 is a wasteful number, since it uses less digits than its factorization.

30724293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 30724293 is about 5542.9498464265. The cubic root of 30724293 is about 313.2039996129.

Adding to 30724293 its reverse (39242703), we get a palindrome (69966996).

The spelling of 30724293 in words is "thirty million, seven hundred twenty-four thousand, two hundred ninety-three".