28135085678 has 24 divisors (see below), whose sum is σ = 49347253872. Its totient is φ = 11995409664.

The previous prime is 28135085653. The next prime is 28135085683. The reversal of 28135085678 is 87658053182.

It is a super-2 number, since 2×28135085678² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 724850 + ... + 762677.

It is an arithmetic number, because the mean of its divisors is an integer number (2056135578).

Almost surely, 2^28135085678 is an apocalyptic number.

28135085678 is a deficient number, since it is larger than the sum of its proper divisors (21212168194).

28135085678 is a wasteful number, since it uses less digits than its factorization.

28135085678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487736 (or 1487729 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 28135085678 in words is "twenty-eight billion, one hundred thirty-five million, eighty-five thousand, six hundred seventy-eight".