28230763428 has 144 divisors (see below), whose sum is σ = 84337204224. Its totient is φ = 7791759360.

The previous prime is 28230763423. The next prime is 28230763453. The reversal of 28230763428 is 82436703282.

28230763428 is a `hidden beast` number, since 2 + 8 + 2 + 3 + 0 + 7 + 634 + 2 + 8 = 666.

It is a super-2 number, since 2×28230763428² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28230763423) 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 47 ways as a sum of consecutive naturals, for example, 4817076 + ... + 4822932.

Almost surely, 2^28230763428 is an apocalyptic number.

28230763428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28230763428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42168602112).

28230763428 is an abundant number, since it is smaller than the sum of its proper divisors (56106440796).

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

28230763428 is a wasteful number, since it uses less digits than its factorization.

28230763428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6522 (or 6517 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 28230763428 in words is "twenty-eight billion, two hundred thirty million, seven hundred sixty-three thousand, four hundred twenty-eight".