28353328578 has 12 divisors (see below), whose sum is σ = 61432211958. Its totient is φ = 9451109520.

The previous prime is 28353328541. The next prime is 28353328583. The reversal of 28353328578 is 87582335382.

It is a happy number.

28353328578 is a `hidden beast` number, since 2 + 8 + 35 + 3 + 32 + 8 + 578 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28142411049 + 210917529 = 167757^2 + 14523^2 .

It is a super-2 number, since 2×28353328578² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 787592443 + ... + 787592478.

Almost surely, 2^28353328578 is an apocalyptic number.

28353328578 is an abundant number, since it is smaller than the sum of its proper divisors (33078883380).

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

28353328578 is a wasteful number, since it uses less digits than its factorization.

28353328578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575184929 (or 1575184926 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 28353328578 in words is "twenty-eight billion, three hundred fifty-three million, three hundred twenty-eight thousand, five hundred seventy-eight".