28878335478 has 24 divisors (see below), whose sum is σ = 62598086928. Its totient is φ = 9621748752.

The previous prime is 28878335411. The next prime is 28878335509. The reversal of 28878335478 is 87453387882.

28878335478 is a `hidden beast` number, since 2 + 8 + 8 + 7 + 83 + 3 + 547 + 8 = 666.

It is a Curzon number.

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, 322650 + ... + 402317.

It is an arithmetic number, because the mean of its divisors is an integer number (2608253622).

Almost surely, 2^28878335478 is an apocalyptic number.

28878335478 is an abundant number, since it is smaller than the sum of its proper divisors (33719751450).

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

28878335478 is a wasteful number, since it uses less digits than its factorization.

28878335478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727188 (or 727185 counting only the distinct ones).

The product of its digits is 72253440, while the sum is 63.

The spelling of 28878335478 in words is "twenty-eight billion, eight hundred seventy-eight million, three hundred thirty-five thousand, four hundred seventy-eight".