30849985 has 8 divisors (see below), whose sum is σ = 39197736. Its totient is φ = 23228160.

The previous prime is 30849953. The next prime is 30850007. The reversal of 30849985 is 58994803.

30849985 = 936² + 937² + ... + 969².

It can be written as a sum of positive squares in 4 ways, for example, as 478864 + 30371121 = 692^2 + 5511^2 .

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

It is not a de Polignac number, because 30849985 - 2⁵ = 30849953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181386 + ... + 181555.

It is an arithmetic number, because the mean of its divisors is an integer number (4899717).

Almost surely, 2^30849985 is an apocalyptic number.

It is an amenable number.

30849985 is a deficient number, since it is larger than the sum of its proper divisors (8347751).

30849985 is a wasteful number, since it uses less digits than its factorization.

30849985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362963.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 30849985 is about 5554.2762804888. The cubic root of 30849985 is about 313.6305206883.

The spelling of 30849985 in words is "thirty million, eight hundred forty-nine thousand, nine hundred eighty-five".