30139985 has 8 divisors (see below), whose sum is σ = 38071680. Its totient is φ = 22842864.

The previous prime is 30139981. The next prime is 30139999. The reversal of 30139985 is 58993103.

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

It is not a de Polignac number, because 30139985 - 2² = 30139981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30139981) 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, 158537 + ... + 158726.

It is an arithmetic number, because the mean of its divisors is an integer number (4758960).

Almost surely, 2^30139985 is an apocalyptic number.

It is an amenable number.

30139985 is a deficient number, since it is larger than the sum of its proper divisors (7931695).

30139985 is a wasteful number, since it uses less digits than its factorization.

30139985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317287.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 30139985 is about 5489.9895264017. The cubic root of 30139985 is about 311.2057963171.

The spelling of 30139985 in words is "thirty million, one hundred thirty-nine thousand, nine hundred eighty-five".