28867778078 has 16 divisors (see below), whose sum is σ = 45187956000. Its totient is φ = 13805226336.

The previous prime is 28867778063. The next prime is 28867778129. The reversal of 28867778078 is 87087776882.

It is a super-2 number, since 2×28867778078² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28867777999 and 28867778017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125776 + ... + 1151132.

It is an arithmetic number, because the mean of its divisors is an integer number (2824247250).

Almost surely, 2^28867778078 is an apocalyptic number.

28867778078 is a deficient number, since it is larger than the sum of its proper divisors (16320177922).

28867778078 is a wasteful number, since it uses less digits than its factorization.

28867778078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50131.

The product of its (nonzero) digits is 118013952, while the sum is 68.

The spelling of 28867778078 in words is "twenty-eight billion, eight hundred sixty-seven million, seven hundred seventy-eight thousand, seventy-eight".