28121188430 has 8 divisors (see below), whose sum is σ = 50618139192. Its totient is φ = 11248475368.

The previous prime is 28121188427. The next prime is 28121188439. The reversal of 28121188430 is 3488112182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28121188439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406059412 + ... + 1406059431.

It is an arithmetic number, because the mean of its divisors is an integer number (6327267399).

Almost surely, 2^28121188430 is an apocalyptic number.

28121188430 is a deficient number, since it is larger than the sum of its proper divisors (22496950762).

28121188430 is a wasteful number, since it uses less digits than its factorization.

28121188430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812118850.

The product of its (nonzero) digits is 24576, while the sum is 38.

The spelling of 28121188430 in words is "twenty-eight billion, one hundred twenty-one million, one hundred eighty-eight thousand, four hundred thirty".