28207135732 has 6 divisors (see below), whose sum is σ = 49362487538. Its totient is φ = 14103567864.

The previous prime is 28207135711. The next prime is 28207135739. The reversal of 28207135732 is 23753170282.

It can be written as a sum of positive squares in only one way, i.e., 23862216676 + 4344919056 = 154474^2 + 65916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28207135739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3525891963 + ... + 3525891970.

Almost surely, 2^28207135732 is an apocalyptic number.

It is an amenable number.

28207135732 is a deficient number, since it is larger than the sum of its proper divisors (21155351806).

28207135732 is a wasteful number, since it uses less digits than its factorization.

28207135732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7051783937 (or 7051783935 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 28207135732 in words is "twenty-eight billion, two hundred seven million, one hundred thirty-five thousand, seven hundred thirty-two".