28135357648 has 20 divisors (see below), whose sum is σ = 54526544800. Its totient is φ = 14063991264.

The previous prime is 28135357633. The next prime is 28135357669. The reversal of 28135357648 is 84675353182.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28135357595 and 28135357604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166998 + ... + 290101.

It is an arithmetic number, because the mean of its divisors is an integer number (2726327240).

Almost surely, 2^28135357648 is an apocalyptic number.

It is an amenable number.

28135357648 is a deficient number, since it is larger than the sum of its proper divisors (26391187152).

28135357648 is a wasteful number, since it uses less digits than its factorization.

28135357648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460954 (or 460948 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 52.

The spelling of 28135357648 in words is "twenty-eight billion, one hundred thirty-five million, three hundred fifty-seven thousand, six hundred forty-eight".