28078733232 has 240 divisors, whose sum is σ = 89694259200. Its totient is φ = 8123673600.

The previous prime is 28078733231. The next prime is 28078733297. The reversal of 28078733232 is 23233787082.

28078733232 is a `hidden beast` number, since 280 + 7 + 8 + 7 + 332 + 32 = 666.

It is not an unprimeable number, because it can be changed into a prime (28078733231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3047769 + ... + 3056967.

It is an arithmetic number, because the mean of its divisors is an integer number (373726080).

Almost surely, 2^28078733232 is an apocalyptic number.

28078733232 is a gapful number since it is divisible by the number (22) 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 28078733232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44847129600).

28078733232 is an abundant number, since it is smaller than the sum of its proper divisors (61615525968).

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

28078733232 is a wasteful number, since it uses less digits than its factorization.

28078733232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9312 (or 9303 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 28078733232 in words is "twenty-eight billion, seventy-eight million, seven hundred thirty-three thousand, two hundred thirty-two".