28944187620 has 48 divisors (see below), whose sum is σ = 84567369600. Its totient is φ = 7382864896.

The previous prime is 28944187583. The next prime is 28944187627. The reversal of 28944187620 is 2678144982.

It is a super-2 number, since 2×28944187620² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28944187627) 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 15 ways as a sum of consecutive naturals, for example, 10485645 + ... + 10488404.

It is an arithmetic number, because the mean of its divisors is an integer number (1761820200).

Almost surely, 2^28944187620 is an apocalyptic number.

28944187620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28944187620 is an abundant number, since it is smaller than the sum of its proper divisors (55623181980).

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

28944187620 is a wasteful number, since it uses less digits than its factorization.

28944187620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20974084 (or 20974082 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 28944187620 in words is "twenty-eight billion, nine hundred forty-four million, one hundred eighty-seven thousand, six hundred twenty".