28550830 has 48 divisors (see below), whose sum is σ = 65228976. Its totient is φ = 8897280.

The previous prime is 28550807. The next prime is 28550833. The reversal of 28550830 is 3805582.

It is a junction number, because it is equal to n+sod(n) for n = 28550792 and 28550801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28550833) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2742 + ... + 8038.

It is an arithmetic number, because the mean of its divisors is an integer number (1358937).

Almost surely, 2^28550830 is an apocalyptic number.

28550830 is an abundant number, since it is smaller than the sum of its proper divisors (36678146).

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

28550830 is a wasteful number, since it uses less digits than its factorization.

28550830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5329 (or 5322 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 28550830 is about 5343.2976709145. The cubic root of 28550830 is about 305.6372236919.

It can be divided in two parts, 285 and 50830, that added together give a palindrome (51115).

The spelling of 28550830 in words is "twenty-eight million, five hundred fifty thousand, eight hundred thirty".