28908820755 has 32 divisors (see below), whose sum is σ = 53051320320. Its totient is φ = 14920679520.

The previous prime is 28908820753. The next prime is 28908820757. The reversal of 28908820755 is 55702880982.

It is an interprime number because it is at equal distance from previous prime (28908820753) and next prime (28908820757).

It is not a de Polignac number, because 28908820755 - 2¹ = 28908820753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28908820753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3449677 + ... + 3458046.

It is an arithmetic number, because the mean of its divisors is an integer number (1657853760).

Almost surely, 2^28908820755 is an apocalyptic number.

28908820755 is a deficient number, since it is larger than the sum of its proper divisors (24142499565).

28908820755 is a wasteful number, since it uses less digits than its factorization.

28908820755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6907768 (or 6907762 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The spelling of 28908820755 in words is "twenty-eight billion, nine hundred eight million, eight hundred twenty thousand, seven hundred fifty-five".