28503264636780 has 96 divisors (see below), whose sum is σ = 81721615793664. Its totient is φ = 7418974477824.

The previous prime is 28503264636761. The next prime is 28503264636793. The reversal of 28503264636780 is 8763646230582.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84217 + ... + 7550736.

It is an arithmetic number, because the mean of its divisors is an integer number (851266831184).

Almost surely, 2^{28503264636780} is an apocalyptic number.

28503264636780 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 28503264636780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40860807896832).

28503264636780 is an abundant number, since it is smaller than the sum of its proper divisors (53218351156884).

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

28503264636780 is a wasteful number, since it uses less digits than its factorization.

28503264636780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7636455 (or 7636453 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 60.

The spelling of 28503264636780 in words is "twenty-eight trillion, five hundred three billion, two hundred sixty-four million, six hundred thirty-six thousand, seven hundred eighty".