28505877628 has 12 divisors (see below), whose sum is σ = 51102000432. Its totient is φ = 13905306080.

The previous prime is 28505877611. The next prime is 28505877667. The reversal of 28505877628 is 82677850582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86908000 + ... + 86908327.

It is an arithmetic number, because the mean of its divisors is an integer number (4258500036).

Almost surely, 2^28505877628 is an apocalyptic number.

It is an amenable number.

28505877628 is a deficient number, since it is larger than the sum of its proper divisors (22596122804).

28505877628 is a wasteful number, since it uses less digits than its factorization.

28505877628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173816372 (or 173816370 counting only the distinct ones).

The product of its (nonzero) digits is 15052800, while the sum is 58.

The spelling of 28505877628 in words is "twenty-eight billion, five hundred five million, eight hundred seventy-seven thousand, six hundred twenty-eight".