30785985 has 24 divisors (see below), whose sum is σ = 56172480. Its totient is φ = 15554592.

The previous prime is 30785969. The next prime is 30785999. The reversal of 30785985 is 58958703.

It is not a de Polignac number, because 30785985 - 2⁴ = 30785969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30785985.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17149 + ... + 18858.

It is an arithmetic number, because the mean of its divisors is an integer number (2340520).

Almost surely, 2^30785985 is an apocalyptic number.

It is an amenable number.

30785985 is a deficient number, since it is larger than the sum of its proper divisors (25386495).

30785985 is a wasteful number, since it uses less digits than its factorization.

30785985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36037 (or 36034 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 30785985 is about 5548.5119626797. The cubic root of 30785985 is about 313.4134892511.

The spelling of 30785985 in words is "thirty million, seven hundred eighty-five thousand, nine hundred eighty-five".