30640346 has 12 divisors (see below), whose sum is σ = 50518986. Its totient is φ = 13927320.

The previous prime is 30640333. The next prime is 30640349. The reversal of 30640346 is 64304603.

It can be written as a sum of positive squares in only one way, i.e., 30129121 + 511225 = 5489^2 + 715^2 .

It is not an unprimeable number, because it can be changed into a prime (30640349) 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 5 ways as a sum of consecutive naturals, for example, 63065 + ... + 63548.

Almost surely, 2^30640346 is an apocalyptic number.

30640346 is a deficient number, since it is larger than the sum of its proper divisors (19878640).

30640346 is a wasteful number, since it uses less digits than its factorization.

30640346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126637 (or 126626 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 30640346 is about 5535.3722548714. The cubic root of 30640346 is about 312.9184870094.

Adding to 30640346 its reverse (64304603), we get a palindrome (94944949).

The spelling of 30640346 in words is "thirty million, six hundred forty thousand, three hundred forty-six".