30985287 has 8 divisors (see below), whose sum is σ = 41364336. Its totient is φ = 20631552.

The previous prime is 30985277. The next prime is 30985313. The reversal of 30985287 is 78258903.

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

It is not a de Polignac number, because 30985287 - 2⁶ = 30985223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30985247) 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 7 ways as a sum of consecutive naturals, for example, 3258 + ... + 8519.

It is an arithmetic number, because the mean of its divisors is an integer number (5170542).

Almost surely, 2^30985287 is an apocalyptic number.

30985287 is a deficient number, since it is larger than the sum of its proper divisors (10379049).

30985287 is a wasteful number, since it uses less digits than its factorization.

30985287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12657.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 30985287 is about 5566.4429396159. The cubic root of 30985287 is about 314.0883593816.

It can be divided in two parts, 3098 and 5287, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 30985287 in words is "thirty million, nine hundred eighty-five thousand, two hundred eighty-seven".