30686475 has 12 divisors (see below), whose sum is σ = 50735096. Its totient is φ = 16366080.

The previous prime is 30686471. The next prime is 30686489. The reversal of 30686475 is 57468603.

It is not a de Polignac number, because 30686475 - 2² = 30686471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30686471) 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 11 ways as a sum of consecutive naturals, for example, 204502 + ... + 204651.

Almost surely, 2^30686475 is an apocalyptic number.

30686475 is a deficient number, since it is larger than the sum of its proper divisors (20048621).

30686475 is a wasteful number, since it uses less digits than its factorization.

30686475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409166 (or 409161 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 30686475 is about 5539.5374355626. The cubic root of 30686475 is about 313.0754410592.

The spelling of 30686475 in words is "thirty million, six hundred eighty-six thousand, four hundred seventy-five".