30878013 has 8 divisors (see below), whose sum is σ = 42046848. Its totient is φ = 20147264.

The previous prime is 30878009. The next prime is 30878027. The reversal of 30878013 is 31087803.

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

It is a cyclic number.

It is not a de Polignac number, because 30878013 - 2² = 30878009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30878033) 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, 109356 + ... + 109637.

It is an arithmetic number, because the mean of its divisors is an integer number (5255856).

Almost surely, 2^30878013 is an apocalyptic number.

It is an amenable number.

30878013 is a deficient number, since it is larger than the sum of its proper divisors (11168835).

30878013 is a wasteful number, since it uses less digits than its factorization.

30878013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219043.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 30878013 is about 5556.7988086667. The cubic root of 30878013 is about 313.7254723872.

The spelling of 30878013 in words is "thirty million, eight hundred seventy-eight thousand, thirteen".