28533299520 has 448 divisors, whose sum is σ = 106708285440. Its totient is φ = 6386688000.

The previous prime is 28533299507. The next prime is 28533299521. The reversal of 28533299520 is 2599233582.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28533299520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28533299521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7041495 + ... + 7045545.

Almost surely, 2^28533299520 is an apocalyptic number.

28533299520 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 28533299520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53354142720).

28533299520 is an abundant number, since it is smaller than the sum of its proper divisors (78174985920).

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

28533299520 is a wasteful number, since it uses less digits than its factorization.

28533299520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134 (or 4124 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 28533299520 in words is "twenty-eight billion, five hundred thirty-three million, two hundred ninety-nine thousand, five hundred twenty".