28656030 has 32 divisors (see below), whose sum is σ = 74065824. Its totient is φ = 7053696.

The previous prime is 28656013. The next prime is 28656049. The reversal of 28656030 is 3065682.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 36349 + ... + 37128.

It is an arithmetic number, because the mean of its divisors is an integer number (2314557).

Almost surely, 2^28656030 is an apocalyptic number.

28656030 is an abundant number, since it is smaller than the sum of its proper divisors (45409794).

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

28656030 is a wasteful number, since it uses less digits than its factorization.

28656030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73500.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 28656030 is about 5353.1327276652. The cubic root of 28656030 is about 306.0121529626.

The spelling of 28656030 in words is "twenty-eight million, six hundred fifty-six thousand, thirty".