28683780810 has 128 divisors (see below), whose sum is σ = 74652399360. Its totient is φ = 7037184000.

The previous prime is 28683780799. The next prime is 28683780817. The reversal of 28683780810 is 1808738682.

It is a super-2 number, since 2×28683780810² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28683780817) 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, 1524460 + ... + 1543160.

It is an arithmetic number, because the mean of its divisors is an integer number (583221870).

Almost surely, 2^28683780810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28683780810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37326199680).

28683780810 is an abundant number, since it is smaller than the sum of its proper divisors (45968618550).

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

28683780810 is a wasteful number, since it uses less digits than its factorization.

28683780810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18824.

The product of its (nonzero) digits is 1032192, while the sum is 51.

The spelling of 28683780810 in words is "twenty-eight billion, six hundred eighty-three million, seven hundred eighty thousand, eight hundred ten".