28081643702 has 32 divisors (see below), whose sum is σ = 49065486912. Its totient is φ = 11803768704.

The previous prime is 28081643701. The next prime is 28081643741. The reversal of 28081643702 is 20734618082.

It is a self number, because there is not a number n which added to its sum of digits gives 28081643702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081643701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3062108 + ... + 3071264.

It is an arithmetic number, because the mean of its divisors is an integer number (1533296466).

Almost surely, 2^28081643702 is an apocalyptic number.

28081643702 is a deficient number, since it is larger than the sum of its proper divisors (20983843210).

28081643702 is a wasteful number, since it uses less digits than its factorization.

28081643702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13352.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 28081643702 in words is "twenty-eight billion, eighty-one million, six hundred forty-three thousand, seven hundred two".