30828819 has 16 divisors (see below), whose sum is σ = 47112192. Its totient is φ = 17565888.

The previous prime is 30828817. The next prime is 30828821. The reversal of 30828819 is 91882803.

It is an interprime number because it is at equal distance from previous prime (30828817) and next prime (30828821).

It is not a de Polignac number, because 30828819 - 2¹ = 30828817 is a prime.

It is a super-2 number, since 2×30828819² = 1900832161869522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30828817) 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 15 ways as a sum of consecutive naturals, for example, 6127 + ... + 9959.

It is an arithmetic number, because the mean of its divisors is an integer number (2944512).

Almost surely, 2^30828819 is an apocalyptic number.

30828819 is a deficient number, since it is larger than the sum of its proper divisors (16283373).

30828819 is a wasteful number, since it uses less digits than its factorization.

30828819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4226.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 30828819 is about 5552.3705748086. The cubic root of 30828819 is about 313.5587775702.

The spelling of 30828819 in words is "thirty million, eight hundred twenty-eight thousand, eight hundred nineteen".