30645136 has 10 divisors (see below), whose sum is σ = 59374982. Its totient is φ = 15322560.

The previous prime is 30645089. The next prime is 30645137. The reversal of 30645136 is 63154603.

It can be written as a sum of positive squares in only one way, i.e., 18113536 + 12531600 = 4256^2 + 3540^2 .

It is not an unprimeable number, because it can be changed into a prime (30645137) 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 as a sum of consecutive naturals, namely, 957645 + ... + 957676.

Almost surely, 2^30645136 is an apocalyptic number.

It is an amenable number.

30645136 is a deficient number, since it is larger than the sum of its proper divisors (28729846).

30645136 is a wasteful number, since it uses less digits than its factorization.

30645136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915329 (or 1915323 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 30645136 is about 5535.8049098573. The cubic root of 30645136 is about 312.9347923241.

Adding to 30645136 its reverse (63154603), we get a palindrome (93799739).

The spelling of 30645136 in words is "thirty million, six hundred forty-five thousand, one hundred thirty-six".