28283943520 has 96 divisors (see below), whose sum is σ = 76406029056. Its totient is φ = 9692352000.

The previous prime is 28283943509. The next prime is 28283943539. The reversal of 28283943520 is 2534938282.

It is a happy number.

It is a super-2 number, since 2×28283943520² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2650195 + ... + 2660845.

It is an arithmetic number, because the mean of its divisors is an integer number (795896136).

Almost surely, 2^28283943520 is an apocalyptic number.

28283943520 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 28283943520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38203014528).

28283943520 is an abundant number, since it is smaller than the sum of its proper divisors (48122085536).

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

28283943520 is a wasteful number, since it uses less digits than its factorization.

28283943520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13044 (or 13036 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 28283943520 in words is "twenty-eight billion, two hundred eighty-three million, nine hundred forty-three thousand, five hundred twenty".