28704504601940 has 96 divisors (see below), whose sum is σ = 63149750471808. Its totient is φ = 10950331392000.

The previous prime is 28704504601933. The next prime is 28704504601973. The reversal of 28704504601940 is 4910640540782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5202980 + ... + 9191300.

It is an arithmetic number, because the mean of its divisors is an integer number (657809900748).

Almost surely, 2^{28704504601940} is an apocalyptic number.

28704504601940 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 28704504601940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31574875235904).

28704504601940 is an abundant number, since it is smaller than the sum of its proper divisors (34445245869868).

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

28704504601940 is a wasteful number, since it uses less digits than its factorization.

28704504601940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988569 (or 3988567 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 28704504601940 in words is "twenty-eight trillion, seven hundred four billion, five hundred four million, six hundred one thousand, nine hundred forty".