28596939840 has 672 divisors, whose sum is σ = 117905808384. Its totient is φ = 6462167040.

The previous prime is 28596939829. The next prime is 28596939841. The reversal of 28596939840 is 4893969582.

28596939840 is a `hidden beast` number, since 2 + 8 + 596 + 9 + 39 + 8 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28596939841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 58241995 + ... + 58242485.

It is an arithmetic number, because the mean of its divisors is an integer number (175455072).

Almost surely, 2^28596939840 is an apocalyptic number.

28596939840 is a gapful number since it is divisible by the number (20) 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 28596939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58952904192).

28596939840 is an abundant number, since it is smaller than the sum of its proper divisors (89308868544).

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

28596939840 is a wasteful number, since it uses less digits than its factorization.

28596939840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 63.

The spelling of 28596939840 in words is "twenty-eight billion, five hundred ninety-six million, nine hundred thirty-nine thousand, eight hundred forty".