28630644042 has 96 divisors (see below), whose sum is σ = 78255301824. Its totient is φ = 6864480000.

The previous prime is 28630644041. The next prime is 28630644047. The reversal of 28630644042 is 24044603682.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (28630644041) 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, 298459 + ... + 382542.

It is an arithmetic number, because the mean of its divisors is an integer number (815159394).

Almost surely, 2^28630644042 is an apocalyptic number.

28630644042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28630644042 is an abundant number, since it is smaller than the sum of its proper divisors (49624657782).

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

28630644042 is a wasteful number, since it uses less digits than its factorization.

28630644042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681044 (or 681037 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 39.

The spelling of 28630644042 in words is "twenty-eight billion, six hundred thirty million, six hundred forty-four thousand, forty-two".