28195064857 has 8 divisors (see below), whose sum is σ = 28342808000. Its totient is φ = 28047382704.

The previous prime is 28195064803. The next prime is 28195064861. The reversal of 28195064857 is 75846059182.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28195064857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28195064798 and 28195064807.

It is not an unprimeable number, because it can be changed into a prime (28195064357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137763 + ... + 1162279.

It is an arithmetic number, because the mean of its divisors is an integer number (3542851000).

Almost surely, 2^28195064857 is an apocalyptic number.

It is an amenable number.

28195064857 is a deficient number, since it is larger than the sum of its proper divisors (147743143).

28195064857 is a wasteful number, since it uses less digits than its factorization.

28195064857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30495.

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 28195064857 in words is "twenty-eight billion, one hundred ninety-five million, sixty-four thousand, eight hundred fifty-seven".