28060637640 has 128 divisors (see below), whose sum is σ = 96357116160. Its totient is φ = 6403912704.

The previous prime is 28060637639. The next prime is 28060637641. The reversal of 28060637640 is 4673606082.

It is an interprime number because it is at equal distance from previous prime (28060637639) and next prime (28060637641).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 28060637592 and 28060637601.

It is not an unprimeable number, because it can be changed into a prime (28060637641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 522942 + ... + 574098.

It is an arithmetic number, because the mean of its divisors is an integer number (752789970).

Almost surely, 2^28060637640 is an apocalyptic number.

28060637640 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 28060637640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48178558080).

28060637640 is an abundant number, since it is smaller than the sum of its proper divisors (68296478520).

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

28060637640 is a wasteful number, since it uses less digits than its factorization.

28060637640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51831 (or 51827 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 28060637640 in words is "twenty-eight billion, sixty million, six hundred thirty-seven thousand, six hundred forty".