28621277075 has 12 divisors (see below), whose sum is σ = 35492880840. Its totient is φ = 22895410560.

The previous prime is 28621277071. The next prime is 28621277099. The reversal of 28621277075 is 57077212682.

It is not a de Polignac number, because 28621277075 - 2² = 28621277071 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28621277071) 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 in 11 ways as a sum of consecutive naturals, for example, 429611 + ... + 491739.

It is an arithmetic number, because the mean of its divisors is an integer number (2957740070).

Almost surely, 2^28621277075 is an apocalyptic number.

28621277075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28621277075 is a deficient number, since it is larger than the sum of its proper divisors (6871603765).

28621277075 is a wasteful number, since it uses less digits than its factorization.

28621277075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80566 (or 80561 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 47.

The spelling of 28621277075 in words is "twenty-eight billion, six hundred twenty-one million, two hundred seventy-seven thousand, seventy-five".