30705236 has 12 divisors (see below), whose sum is σ = 53970420. Its totient is φ = 15285120.

The previous prime is 30705223. The next prime is 30705263. The reversal of 30705236 is 63250703.

It can be written as a sum of positive squares in 2 ways, for example, as 19749136 + 10956100 = 4444^2 + 3310^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15845 + ... + 17676.

It is an arithmetic number, because the mean of its divisors is an integer number (4497535).

Almost surely, 2^30705236 is an apocalyptic number.

It is an amenable number.

30705236 is a deficient number, since it is larger than the sum of its proper divisors (23265184).

30705236 is a wasteful number, since it uses less digits than its factorization.

30705236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33754 (or 33752 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 30705236 is about 5541.2305492553. The cubic root of 30705236 is about 313.1392304187.

Adding to 30705236 its reverse (63250703), we get a palindrome (93955939).

The spelling of 30705236 in words is "thirty million, seven hundred five thousand, two hundred thirty-six".