28345641000 has 128 divisors (see below), whose sum is σ = 88500297600. Its totient is φ = 7553548800.

The previous prime is 28345640971. The next prime is 28345641043. The reversal of 28345641000 is 14654382.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6264739 + ... + 6269261.

It is an arithmetic number, because the mean of its divisors is an integer number (691408575).

Almost surely, 2^28345641000 is an apocalyptic number.

28345641000 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 28345641000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44250148800).

28345641000 is an abundant number, since it is smaller than the sum of its proper divisors (60154656600).

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

28345641000 is a wasteful number, since it uses less digits than its factorization.

28345641000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6636 (or 6622 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 28345641000 in words is "twenty-eight billion, three hundred forty-five million, six hundred forty-one thousand".