28545067540 has 288 divisors, whose sum is σ = 72791478144. Its totient is φ = 9314672640.

The previous prime is 28545067511. The next prime is 28545067541. The reversal of 28545067540 is 4576054582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28545067541) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 144898722 + ... + 144898918.

It is an arithmetic number, because the mean of its divisors is an integer number (252748188).

Almost surely, 2^28545067540 is an apocalyptic number.

28545067540 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 28545067540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36395739072).

28545067540 is an abundant number, since it is smaller than the sum of its proper divisors (44246410604).

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

28545067540 is a wasteful number, since it uses less digits than its factorization.

28545067540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 46.

The spelling of 28545067540 in words is "twenty-eight billion, five hundred forty-five million, sixty-seven thousand, five hundred forty".