28939377783776 has 96 divisors (see below), whose sum is σ = 59053111326720. Its totient is φ = 13952432736256.

The previous prime is 28939377783763. The next prime is 28939377783793. The reversal of 28939377783776 is 67738777393982.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27872165 + ... + 28891803.

It is an arithmetic number, because the mean of its divisors is an integer number (615136576320).

Almost surely, 2^{28939377783776} 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 28939377783776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29526555663360).

28939377783776 is an abundant number, since it is smaller than the sum of its proper divisors (30113733542944).

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

28939377783776 is a wasteful number, since it uses less digits than its factorization.

28939377783776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019976 (or 1019968 counting only the distinct ones).

The product of its digits is 28229306112, while the sum is 86.

The spelling of 28939377783776 in words is "twenty-eight trillion, nine hundred thirty-nine billion, three hundred seventy-seven million, seven hundred eighty-three thousand, seven hundred seventy-six".