28648230 has 128 divisors (see below), whose sum is σ = 81648000. Its totient is φ = 6365184.

The previous prime is 28648199. The next prime is 28648237. The reversal of 28648230 is 3284682.

It is a junction number, because it is equal to n+sod(n) for n = 28648191 and 28648200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28648237) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 192196 + ... + 192344.

It is an arithmetic number, because the mean of its divisors is an integer number (637875).

Almost surely, 2^28648230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28648230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40824000).

28648230 is an abundant number, since it is smaller than the sum of its proper divisors (52999770).

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

28648230 is a wasteful number, since it uses less digits than its factorization.

28648230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28648230 is about 5352.4041327239. The cubic root of 28648230 is about 305.9843855504.

It can be divided in two parts, 286 and 48230, that added together give a triangular number (48516 = T₃₁₁).

The spelling of 28648230 in words is "twenty-eight million, six hundred forty-eight thousand, two hundred thirty".