28821746730 has 32 divisors (see below), whose sum is σ = 79053934464. Its totient is φ = 6587827776.

The previous prime is 28821746717. The next prime is 28821746731. The reversal of 28821746730 is 3764712882.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28821746730.

It is not an unprimeable number, because it can be changed into a prime (28821746731) 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 15 ways as a sum of consecutive naturals, for example, 68622997 + ... + 68623416.

It is an arithmetic number, because the mean of its divisors is an integer number (2470435452).

Almost surely, 2^28821746730 is an apocalyptic number.

28821746730 is an abundant number, since it is smaller than the sum of its proper divisors (50232187734).

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

28821746730 is a wasteful number, since it uses less digits than its factorization.

28821746730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137246430.

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 28821746730 in words is "twenty-eight billion, eight hundred twenty-one million, seven hundred forty-six thousand, seven hundred thirty".