28051816132 has 6 divisors (see below), whose sum is σ = 49090678238. Its totient is φ = 14025908064.

The previous prime is 28051816123. The next prime is 28051816151. The reversal of 28051816132 is 23161815082.

It can be written as a sum of positive squares in only one way, i.e., 16854790276 + 11197025856 = 129826^2 + 105816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28051816091 and 28051816100.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3506477013 + ... + 3506477020.

Almost surely, 2^28051816132 is an apocalyptic number.

It is an amenable number.

28051816132 is a deficient number, since it is larger than the sum of its proper divisors (21038862106).

28051816132 is a wasteful number, since it uses less digits than its factorization.

28051816132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7012954037 (or 7012954035 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 28051816132 in words is "twenty-eight billion, fifty-one million, eight hundred sixteen thousand, one hundred thirty-two".