30805136 has 10 divisors (see below), whose sum is σ = 59684982. Its totient is φ = 15402560.

The previous prime is 30805129. The next prime is 30805169. The reversal of 30805136 is 63150803.

It can be written as a sum of positive squares in only one way, i.e., 23814400 + 6990736 = 4880^2 + 2644^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962645 + ... + 962676.

Almost surely, 2^30805136 is an apocalyptic number.

It is an amenable number.

30805136 is a deficient number, since it is larger than the sum of its proper divisors (28879846).

30805136 is a wasteful number, since it uses less digits than its factorization.

30805136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925329 (or 1925323 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 30805136 is about 5550.2374723970. The cubic root of 30805136 is about 313.4784640285.

Adding to 30805136 its reverse (63150803), we get a palindrome (93955939).

The spelling of 30805136 in words is "thirty million, eight hundred five thousand, one hundred thirty-six".