28753575478 has 4 divisors (see below), whose sum is σ = 43130363220. Its totient is φ = 14376787738.

The previous prime is 28753575467. The next prime is 28753575491. The reversal of 28753575478 is 87457535782.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7188393868 + ... + 7188393871.

It is an arithmetic number, because the mean of its divisors is an integer number (10782590805).

Almost surely, 2^28753575478 is an apocalyptic number.

28753575478 is a deficient number, since it is larger than the sum of its proper divisors (14376787742).

28753575478 is a wasteful number, since it uses less digits than its factorization.

28753575478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14376787741.

The product of its digits is 65856000, while the sum is 61.

The spelling of 28753575478 in words is "twenty-eight billion, seven hundred fifty-three million, five hundred seventy-five thousand, four hundred seventy-eight".