28354430400 has 168 divisors, whose sum is σ = 93348285744. Its totient is φ = 7535001600.

The previous prime is 28354430399. The next prime is 28354430413. The reversal of 28354430400 is 403445382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1396320 + ... + 1416480.

It is an arithmetic number, because the mean of its divisors is an integer number (555644558).

Almost surely, 2^28354430400 is an apocalyptic number.

28354430400 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 28354430400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46674142872).

28354430400 is an abundant number, since it is smaller than the sum of its proper divisors (64993855344).

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

28354430400 is a wasteful number, since it uses less digits than its factorization.

28354430400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20479 (or 20464 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 28354430400 its reverse (403445382), we get a palindrome (28757875782).

The spelling of 28354430400 in words is "twenty-eight billion, three hundred fifty-four million, four hundred thirty thousand, four hundred".