28135185753520 has 40 divisors (see below), whose sum is σ = 65674921692240. Its totient is φ = 11209237344000.

The previous prime is 28135185753497. The next prime is 28135185753583. The reversal of 28135185753520 is 2535758153182.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700557255 + ... + 700597414.

It is an arithmetic number, because the mean of its divisors is an integer number (1641873042306).

Almost surely, 2^{28135185753520} is an apocalyptic number.

28135185753520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28135185753520 is an abundant number, since it is smaller than the sum of its proper divisors (37539735938720).

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

28135185753520 is a wasteful number, since it uses less digits than its factorization.

28135185753520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401154933 (or 1401154927 counting only the distinct ones).

The product of its (nonzero) digits is 10080000, while the sum is 55.

The spelling of 28135185753520 in words is "twenty-eight trillion, one hundred thirty-five billion, one hundred eighty-five million, seven hundred fifty-three thousand, five hundred twenty".