28785117146 has 8 divisors (see below), whose sum is σ = 44570504064. Its totient is φ = 13928282460.

The previous prime is 28785117131. The next prime is 28785117169. The reversal of 28785117146 is 64171158782.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28785117094 and 28785117103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232137980 + ... + 232138103.

It is an arithmetic number, because the mean of its divisors is an integer number (5571313008).

Almost surely, 2^28785117146 is an apocalyptic number.

28785117146 is a deficient number, since it is larger than the sum of its proper divisors (15785386918).

28785117146 is a wasteful number, since it uses less digits than its factorization.

28785117146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464276116.

The product of its digits is 752640, while the sum is 50.

The spelling of 28785117146 in words is "twenty-eight billion, seven hundred eighty-five million, one hundred seventeen thousand, one hundred forty-six".