28686946952 has 16 divisors (see below), whose sum is σ = 54018878940. Its totient is φ = 14281912576.

The previous prime is 28686946933. The next prime is 28686946991. The reversal of 28686946952 is 25964968682.

It can be written as a sum of positive squares in 2 ways, for example, as 27174203716 + 1512743236 = 164846^2 + 38894^2 .

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, 7693133 + ... + 7696860.

Almost surely, 2^28686946952 is an apocalyptic number.

It is an amenable number.

28686946952 is a deficient number, since it is larger than the sum of its proper divisors (25331931988).

28686946952 is a wasteful number, since it uses less digits than its factorization.

28686946952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15390232 (or 15390228 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 65.

The spelling of 28686946952 in words is "twenty-eight billion, six hundred eighty-six million, nine hundred forty-six thousand, nine hundred fifty-two".