28315947908 has 12 divisors (see below), whose sum is σ = 49809661020. Its totient is φ = 14084616192.

The previous prime is 28315947859. The next prime is 28315947923. The reversal of 28315947908 is 80974951382.

It can be written as a sum of positive squares in 2 ways, for example, as 14996941444 + 13319006464 = 122462^2 + 115408^2 .

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, 18338573 + ... + 18340116.

It is an arithmetic number, because the mean of its divisors is an integer number (4150805085).

Almost surely, 2^28315947908 is an apocalyptic number.

It is an amenable number.

28315947908 is a deficient number, since it is larger than the sum of its proper divisors (21493713112).

28315947908 is a wasteful number, since it uses less digits than its factorization.

28315947908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36678886 (or 36678884 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 28315947908 in words is "twenty-eight billion, three hundred fifteen million, nine hundred forty-seven thousand, nine hundred eight".