28840361286 has 64 divisors (see below), whose sum is σ = 64498726656. Its totient is φ = 8521113600.

The previous prime is 28840361243. The next prime is 28840361287. The reversal of 28840361286 is 68216304882.

It is a super-3 number, since 3×28840361286³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28840361287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8340870 + ... + 8344326.

It is an arithmetic number, because the mean of its divisors is an integer number (1007792604).

Almost surely, 2^28840361286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28840361286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32249363328).

28840361286 is an abundant number, since it is smaller than the sum of its proper divisors (35658365370).

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

28840361286 is a wasteful number, since it uses less digits than its factorization.

28840361286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6597.

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 28840361286 in words is "twenty-eight billion, eight hundred forty million, three hundred sixty-one thousand, two hundred eighty-six".