28634314578 has 16 divisors (see below), whose sum is σ = 58816430400. Its totient is φ = 9286804656.

The previous prime is 28634314547. The next prime is 28634314637. The reversal of 28634314578 is 87541343682.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28634314578.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64491478 + ... + 64491921.

It is an arithmetic number, because the mean of its divisors is an integer number (3676026900).

Almost surely, 2^28634314578 is an apocalyptic number.

28634314578 is an abundant number, since it is smaller than the sum of its proper divisors (30182115822).

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

28634314578 is a wasteful number, since it uses less digits than its factorization.

28634314578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128983441.

The product of its digits is 3870720, while the sum is 51.

The spelling of 28634314578 in words is "twenty-eight billion, six hundred thirty-four million, three hundred fourteen thousand, five hundred seventy-eight".