28397938632 has 256 divisors, whose sum is σ = 87146496000. Its totient is φ = 7693297920.

The previous prime is 28397938601. The next prime is 28397938633. The reversal of 28397938632 is 23683979382.

It is a super-3 number, since 3×28397938632³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28397938633) 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 63 ways as a sum of consecutive naturals, for example, 24045082 + ... + 24046262.

It is an arithmetic number, because the mean of its divisors is an integer number (340416000).

Almost surely, 2^28397938632 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 28397938632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43573248000).

28397938632 is an abundant number, since it is smaller than the sum of its proper divisors (58748557368).

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

28397938632 is a wasteful number, since it uses less digits than its factorization.

28397938632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361 (or 1343 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 60.

The spelling of 28397938632 in words is "twenty-eight billion, three hundred ninety-seven million, nine hundred thirty-eight thousand, six hundred thirty-two".