28785657280002 has 32 divisors (see below), whose sum is σ = 65854377480192. Its totient is φ = 8217149832144.

The previous prime is 28785657279893. The next prime is 28785657280057. The reversal of 28785657280002 is 20008275658782.

It is a super-2 number, since 2×28785657280002² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305105458 + ... + 305199789.

It is an arithmetic number, because the mean of its divisors is an integer number (2057949296256).

Almost surely, 2^{28785657280002} is an apocalyptic number.

28785657280002 is an abundant number, since it is smaller than the sum of its proper divisors (37068720200190).

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

28785657280002 is a wasteful number, since it uses less digits than its factorization.

28785657280002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610306382.

The product of its (nonzero) digits is 30105600, while the sum is 60.

The spelling of 28785657280002 in words is "twenty-eight trillion, seven hundred eighty-five billion, six hundred fifty-seven million, two hundred eighty thousand, two".