30642387 has 8 divisors (see below), whose sum is σ = 40988304. Its totient is φ = 20362368.

The previous prime is 30642377. The next prime is 30642413. The reversal of 30642387 is 78324603.

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

It is not a de Polignac number, because 30642387 - 2¹⁶ = 30576851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30642377) 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, 15378 + ... + 17255.

It is an arithmetic number, because the mean of its divisors is an integer number (5123538).

Almost surely, 2^30642387 is an apocalyptic number.

30642387 is a deficient number, since it is larger than the sum of its proper divisors (10345917).

30642387 is a wasteful number, since it uses less digits than its factorization.

30642387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32949.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 30642387 is about 5535.5566115794. The cubic root of 30642387 is about 312.9254348471.

The spelling of 30642387 in words is "thirty million, six hundred forty-two thousand, three hundred eighty-seven".