28503030 has 32 divisors (see below), whose sum is σ = 69237504. Its totient is φ = 7508576.

The previous prime is 28503017. The next prime is 28503031. The reversal of 28503030 is 3030582.

28503030 is a modest number, since divided by 3030 gives 2850 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 28502988 and 28503006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28503031) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 3234 + ... + 8213.

It is an arithmetic number, because the mean of its divisors is an integer number (2163672).

Almost surely, 2^28503030 is an apocalyptic number.

28503030 is an abundant number, since it is smaller than the sum of its proper divisors (40734474).

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

28503030 is a wasteful number, since it uses less digits than its factorization.

28503030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11540.

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

The square root of 28503030 is about 5338.8229039742. The cubic root of 28503030 is about 305.4665617535.

The spelling of 28503030 in words is "twenty-eight million, five hundred three thousand, thirty".