28773462578 has 16 divisors (see below), whose sum is σ = 50332588800. Its totient is φ = 12331483668.

The previous prime is 28773462547. The next prime is 28773462581. The reversal of 28773462578 is 87526437782.

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, 20971226 + ... + 20972597.

It is an arithmetic number, because the mean of its divisors is an integer number (3145786800).

Almost surely, 2^28773462578 is an apocalyptic number.

28773462578 is a deficient number, since it is larger than the sum of its proper divisors (21559126222).

28773462578 is an equidigital number, since it uses as much as digits as its factorization.

28773462578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41943846 (or 41943832 counting only the distinct ones).

The product of its digits is 31610880, while the sum is 59.

The spelling of 28773462578 in words is "twenty-eight billion, seven hundred seventy-three million, four hundred sixty-two thousand, five hundred seventy-eight".