28430656044 has 96 divisors (see below), whose sum is σ = 81070004736. Its totient is φ = 7569484800.

The previous prime is 28430656043. The next prime is 28430656057. The reversal of 28430656044 is 44065603482.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 28430655987 and 28430656005.

It is not an unprimeable number, because it can be changed into a prime (28430656043) 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 31 ways as a sum of consecutive naturals, for example, 45667 + ... + 242789.

It is an arithmetic number, because the mean of its divisors is an integer number (844479216).

Almost surely, 2^28430656044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28430656044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40535002368).

28430656044 is an abundant number, since it is smaller than the sum of its proper divisors (52639348692).

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

28430656044 is a wasteful number, since it uses less digits than its factorization.

28430656044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197255 (or 197253 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 28430656044 in words is "twenty-eight billion, four hundred thirty million, six hundred fifty-six thousand, forty-four".