28507635510780 has 48 divisors (see below), whose sum is σ = 79824205026720. Its totient is φ = 7601767031808.

The previous prime is 28507635510709. The next prime is 28507635510803. The reversal of 28507635510780 is 8701553670582.

It is a self number, because there is not a number n which added to its sum of digits gives 28507635510780.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6697545 + ... + 10093184.

It is an arithmetic number, because the mean of its divisors is an integer number (1663004271390).

Almost surely, 2^{28507635510780} is an apocalyptic number.

28507635510780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28507635510780 is an abundant number, since it is smaller than the sum of its proper divisors (51316569515940).

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

28507635510780 is a wasteful number, since it uses less digits than its factorization.

28507635510780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16819038 (or 16819036 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 57.

The spelling of 28507635510780 in words is "twenty-eight trillion, five hundred seven billion, six hundred thirty-five million, five hundred ten thousand, seven hundred eighty".