30128613 has 8 divisors (see below), whose sum is σ = 40294176. Its totient is φ = 20024400.

The previous prime is 30128599. The next prime is 30128617. The reversal of 30128613 is 31682103.

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

It is not a de Polignac number, because 30128613 - 2¹⁸ = 29866469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30128617) 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, 14178 + ... + 16163.

It is an arithmetic number, because the mean of its divisors is an integer number (5036772).

Almost surely, 2^30128613 is an apocalyptic number.

It is an amenable number.

30128613 is a deficient number, since it is larger than the sum of its proper divisors (10165563).

30128613 is a wasteful number, since it uses less digits than its factorization.

30128613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30675.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 30128613 is about 5488.9537254380. The cubic root of 30128613 is about 311.1666514457.

The spelling of 30128613 in words is "thirty million, one hundred twenty-eight thousand, six hundred thirteen".