30685047 has 8 divisors (see below), whose sum is σ = 41226240. Its totient is φ = 20300280.

The previous prime is 30685043. The next prime is 30685073. The reversal of 30685047 is 74058603.

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

It is not a de Polignac number, because 30685047 - 2² = 30685043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30684999 and 30685017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30685043) 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, 38647 + ... + 39432.

It is an arithmetic number, because the mean of its divisors is an integer number (5153280).

Almost surely, 2^30685047 is an apocalyptic number.

30685047 is a deficient number, since it is larger than the sum of its proper divisors (10541193).

30685047 is a wasteful number, since it uses less digits than its factorization.

30685047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78213.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 30685047 is about 5539.4085424348. The cubic root of 30685047 is about 313.0705846454.

The spelling of 30685047 in words is "thirty million, six hundred eighty-five thousand, forty-seven".