28433259520 has 176 divisors, whose sum is σ = 70744320000. Its totient is φ = 10953768960.

The previous prime is 28433259431. The next prime is 28433259541. The reversal of 28433259520 is 2595233482.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56980231 + ... + 56980729.

Almost surely, 2^28433259520 is an apocalyptic number.

28433259520 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 28433259520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35372160000).

28433259520 is an abundant number, since it is smaller than the sum of its proper divisors (42311060480).

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

28433259520 is a wasteful number, since it uses less digits than its factorization.

28433259520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 896 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 28433259520 in words is "twenty-eight billion, four hundred thirty-three million, two hundred fifty-nine thousand, five hundred twenty".