28540185564990 has 48 divisors (see below), whose sum is σ = 75289481268624. Its totient is φ = 6918832863360.

The previous prime is 28540185564929. The next prime is 28540185565007. The reversal of 28540185564990 is 9946558104582.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3931151407 + ... + 3931158666.

It is an arithmetic number, because the mean of its divisors is an integer number (1568530859763).

Almost surely, 2^{28540185564990} is an apocalyptic number.

28540185564990 is an abundant number, since it is smaller than the sum of its proper divisors (46749295703634).

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

28540185564990 is a wasteful number, since it uses less digits than its factorization.

28540185564990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7862310105 (or 7862310094 counting only the distinct ones).

The product of its (nonzero) digits is 124416000, while the sum is 66.

The spelling of 28540185564990 in words is "twenty-eight trillion, five hundred forty billion, one hundred eighty-five million, five hundred sixty-four thousand, nine hundred ninety".