28530030 has 16 divisors (see below), whose sum is σ = 68472144. Its totient is φ = 7608000.

The previous prime is 28530023. The next prime is 28530031. The reversal of 28530030 is 3003582.

It is a super-2 number, since 2×28530030² = 1627925223601800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28529979 and 28530006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28530031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475471 + ... + 475530.

It is an arithmetic number, because the mean of its divisors is an integer number (4279509).

Almost surely, 2^28530030 is an apocalyptic number.

28530030 is an abundant number, since it is smaller than the sum of its proper divisors (39942114).

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

28530030 is a wasteful number, since it uses less digits than its factorization.

28530030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951011.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 28530030 is about 5341.3509527085. The cubic root of 28530030 is about 305.5629841843.

The spelling of 28530030 in words is "twenty-eight million, five hundred thirty thousand, thirty".