28232675440 has 80 divisors (see below), whose sum is σ = 67908528576. Its totient is φ = 10908416000.

The previous prime is 28232675389. The next prime is 28232675441. The reversal of 28232675440 is 4457623282.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28232675441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288669 + ... + 373891.

Almost surely, 2^28232675440 is an apocalyptic number.

28232675440 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 28232675440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33954264288).

28232675440 is an abundant number, since it is smaller than the sum of its proper divisors (39675853136).

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

28232675440 is a wasteful number, since it uses less digits than its factorization.

28232675440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85378 (or 85372 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 43.

The spelling of 28232675440 in words is "twenty-eight billion, two hundred thirty-two million, six hundred seventy-five thousand, four hundred forty".