30828478 has 4 divisors (see below), whose sum is σ = 46242720. Its totient is φ = 15414238.

The previous prime is 30828461. The next prime is 30828481. The reversal of 30828478 is 87482803.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 30828478.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7707118 + ... + 7707121.

It is an arithmetic number, because the mean of its divisors is an integer number (11560680).

Almost surely, 2^30828478 is an apocalyptic number.

30828478 is a deficient number, since it is larger than the sum of its proper divisors (15414242).

30828478 is a wasteful number, since it uses less digits than its factorization.

30828478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15414241.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 30828478 is about 5552.3398671191. The cubic root of 30828478 is about 313.5576214665.

The spelling of 30828478 in words is "thirty million, eight hundred twenty-eight thousand, four hundred seventy-eight".