28642078629228 has 96 divisors (see below), whose sum is σ = 68891469337600. Its totient is φ = 9258251498496.

The previous prime is 28642078629211. The next prime is 28642078629259. The reversal of 28642078629228 is 82292687024682.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20735838 + ... + 22073946.

Almost surely, 2^{28642078629228} is an apocalyptic number.

It is an amenable number.

28642078629228 is an abundant number, since it is smaller than the sum of its proper divisors (40249390708372).

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

28642078629228 is a wasteful number, since it uses less digits than its factorization.

28642078629228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338599 (or 1338597 counting only the distinct ones).

The product of its (nonzero) digits is 148635648, while the sum is 66.

The spelling of 28642078629228 in words is "twenty-eight trillion, six hundred forty-two billion, seventy-eight million, six hundred twenty-nine thousand, two hundred twenty-eight".