30685985 has 8 divisors (see below), whose sum is σ = 40170816. Its totient is φ = 22317040.

The previous prime is 30685981. The next prime is 30685997. The reversal of 30685985 is 58958603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30685985 - 2² = 30685981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30685981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278909 + ... + 279018.

It is an arithmetic number, because the mean of its divisors is an integer number (5021352).

Almost surely, 2^30685985 is an apocalyptic number.

It is an amenable number.

30685985 is a deficient number, since it is larger than the sum of its proper divisors (9484831).

30685985 is a wasteful number, since it uses less digits than its factorization.

30685985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557943.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 30685985 is about 5539.4932078666. The cubic root of 30685985 is about 313.0737746597.

It can be divided in two parts, 3068598 and 5, that added together give a palindrome (3068603).

The spelling of 30685985 in words is "thirty million, six hundred eighty-five thousand, nine hundred eighty-five".