30005028 has 36 divisors (see below), whose sum is σ = 79839760. Its totient is φ = 9475056.

The previous prime is 30005023. The next prime is 30005029. The reversal of 30005028 is 82050003.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 30005028.

It is not an unprimeable number, because it can be changed into a prime (30005023) 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 11 ways as a sum of consecutive naturals, for example, 21250 + ... + 22617.

Almost surely, 2^30005028 is an apocalyptic number.

30005028 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

30005028 is an abundant number, since it is smaller than the sum of its proper divisors (49834732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30005028 is a wasteful number, since it uses less digits than its factorization.

30005028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43896 (or 43891 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 30005028 is about 5477.6845473247. The cubic root of 30005028 is about 310.7406086979.

The spelling of 30005028 in words is "thirty million, five thousand, twenty-eight".