28835784540 has 336 divisors, whose sum is σ = 96697867392. Its totient is φ = 7194728448.

The previous prime is 28835784533. The next prime is 28835784599. The reversal of 28835784540 is 4548753882.

28835784540 is a `hidden beast` number, since 28 + 8 + 3 + 5 + 78 + 4 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 78571437 + ... + 78571803.

It is an arithmetic number, because the mean of its divisors is an integer number (287791272).

Almost surely, 2^28835784540 is an apocalyptic number.

28835784540 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 28835784540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48348933696).

28835784540 is an abundant number, since it is smaller than the sum of its proper divisors (67862082852).

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

28835784540 is a wasteful number, since it uses less digits than its factorization.

28835784540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 54.

The spelling of 28835784540 in words is "twenty-eight billion, eight hundred thirty-five million, seven hundred eighty-four thousand, five hundred forty".