28001321430 has 16 divisors (see below), whose sum is σ = 67203171504. Its totient is φ = 7467019040.

The previous prime is 28001321429. The next prime is 28001321437. The reversal of 28001321430 is 3412310082.

It is a self number, because there is not a number n which added to its sum of digits gives 28001321430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28001321437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466688661 + ... + 466688720.

It is an arithmetic number, because the mean of its divisors is an integer number (4200198219).

Almost surely, 2^28001321430 is an apocalyptic number.

28001321430 is an abundant number, since it is smaller than the sum of its proper divisors (39201850074).

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

28001321430 is a wasteful number, since it uses less digits than its factorization.

28001321430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933377391.

The product of its (nonzero) digits is 1152, while the sum is 24.

The spelling of 28001321430 in words is "twenty-eight billion, one million, three hundred twenty-one thousand, four hundred thirty".