28207717965 has 64 divisors (see below), whose sum is σ = 60327321600. Its totient is φ = 12216267072.

The previous prime is 28207717957. The next prime is 28207717991. The reversal of 28207717965 is 56971770282.

It is a happy number.

It is not a de Polignac number, because 28207717965 - 2³ = 28207717957 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 63 ways as a sum of consecutive naturals, for example, 767557 + ... + 803466.

It is an arithmetic number, because the mean of its divisors is an integer number (942614400).

Almost surely, 2^28207717965 is an apocalyptic number.

It is an amenable number.

28207717965 is an abundant number, since it is smaller than the sum of its proper divisors (32119603635).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28207717965 is a wasteful number, since it uses less digits than its factorization.

28207717965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571063 (or 1571057 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 28207717965 in words is "twenty-eight billion, two hundred seven million, seven hundred seventeen thousand, nine hundred sixty-five".