30905936 has 20 divisors (see below), whose sum is σ = 60082464. Its totient is φ = 15400800.

The previous prime is 30905891. The next prime is 30905939. The reversal of 30905936 is 63950903.

It is a junction number, because it is equal to n+sod(n) for n = 30905896 and 30905905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30905939) 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 3 ways as a sum of consecutive naturals, for example, 1871 + ... + 8081.

Almost surely, 2^30905936 is an apocalyptic number.

It is an amenable number.

30905936 is a deficient number, since it is larger than the sum of its proper divisors (29176528).

30905936 is a wasteful number, since it uses less digits than its factorization.

30905936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530 (or 6524 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 30905936 is about 5559.3107486450. The cubic root of 30905936 is about 313.8200112542.

The spelling of 30905936 in words is "thirty million, nine hundred five thousand, nine hundred thirty-six".