28636257183520 has 48 divisors (see below), whose sum is σ = 77317894398528. Its totient is φ = 9818145319680.

The previous prime is 28636257183493. The next prime is 28636257183539. The reversal of 28636257183520 is 2538175263682.

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, 12784042266 + ... + 12784044505.

It is an arithmetic number, because the mean of its divisors is an integer number (1610789466636).

Almost surely, 2^{28636257183520} is an apocalyptic number.

28636257183520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28636257183520 is an abundant number, since it is smaller than the sum of its proper divisors (48681637215008).

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

28636257183520 is a wasteful number, since it uses less digits than its factorization.

28636257183520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25568086793 (or 25568086785 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 58.

The spelling of 28636257183520 in words is "twenty-eight trillion, six hundred thirty-six billion, two hundred fifty-seven million, one hundred eighty-three thousand, five hundred twenty".