28628694765 has 96 divisors (see below), whose sum is σ = 55542195072. Its totient is φ = 13523904000.

The previous prime is 28628694761. The next prime is 28628694767. The reversal of 28628694765 is 56749682682.

28628694765 is a `hidden beast` number, since 2 + 86 + 2 + 86 + 9 + 476 + 5 = 666.

It is not a de Polignac number, because 28628694765 - 2² = 28628694761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28628694761) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3226435 + ... + 3235295.

It is an arithmetic number, because the mean of its divisors is an integer number (578564532).

Almost surely, 2^28628694765 is an apocalyptic number.

It is an amenable number.

28628694765 is a deficient number, since it is larger than the sum of its proper divisors (26913500307).

28628694765 is a wasteful number, since it uses less digits than its factorization.

28628694765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9051 (or 9048 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 28628694765 in words is "twenty-eight billion, six hundred twenty-eight million, six hundred ninety-four thousand, seven hundred sixty-five".