30428686 has 8 divisors (see below), whose sum is σ = 45666504. Its totient is φ = 15206520.

The previous prime is 30428621. The next prime is 30428687. The reversal of 30428686 is 68682403.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30428687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5121 + ... + 9331.

It is an arithmetic number, because the mean of its divisors is an integer number (5708313).

Almost surely, 2^30428686 is an apocalyptic number.

30428686 is a deficient number, since it is larger than the sum of its proper divisors (15237818).

30428686 is a wasteful number, since it uses less digits than its factorization.

30428686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7826.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 30428686 is about 5516.2202639126. The cubic root of 30428686 is about 312.1962864682.

The spelling of 30428686 in words is "thirty million, four hundred twenty-eight thousand, six hundred eighty-six".