28406773012 has 6 divisors (see below), whose sum is σ = 49711852778. Its totient is φ = 14203386504.

The previous prime is 28406773007. The next prime is 28406773081. The reversal of 28406773012 is 21037760482.

It can be written as a sum of positive squares in only one way, i.e., 20153777296 + 8252995716 = 141964^2 + 90846^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3550846623 + ... + 3550846630.

Almost surely, 2^28406773012 is an apocalyptic number.

It is an amenable number.

28406773012 is a deficient number, since it is larger than the sum of its proper divisors (21305079766).

28406773012 is a wasteful number, since it uses less digits than its factorization.

28406773012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7101693257 (or 7101693255 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 28406773012 in words is "twenty-eight billion, four hundred six million, seven hundred seventy-three thousand, twelve".