28268470665 has 48 divisors (see below), whose sum is σ = 51150293376. Its totient is φ = 14976576000.

The previous prime is 28268470649. The next prime is 28268470709. The reversal of 28268470665 is 56607486282.

It is not a de Polignac number, because 28268470665 - 2⁴ = 28268470649 is a prime.

It is a super-3 number, since 3×28268470665³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106425 + ... + 260505.

It is an arithmetic number, because the mean of its divisors is an integer number (1065631112).

Almost surely, 2^28268470665 is an apocalyptic number.

It is an amenable number.

28268470665 is a deficient number, since it is larger than the sum of its proper divisors (22881822711).

28268470665 is a wasteful number, since it uses less digits than its factorization.

28268470665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154252 (or 154240 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 28268470665 in words is "twenty-eight billion, two hundred sixty-eight million, four hundred seventy thousand, six hundred sixty-five".