28007314638 has 16 divisors (see below), whose sum is σ = 56125996416. Its totient is φ = 9317210360.

The previous prime is 28007314637. The next prime is 28007314651. The reversal of 28007314638 is 83641370082.

It is a Smith number, since the sum of its digits (42) 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 28007314638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28007314633) 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 7 ways as a sum of consecutive naturals, for example, 4637028 + ... + 4643063.

It is an arithmetic number, because the mean of its divisors is an integer number (3507874776).

Almost surely, 2^28007314638 is an apocalyptic number.

28007314638 is an abundant number, since it is smaller than the sum of its proper divisors (28118681778).

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

28007314638 is a wasteful number, since it uses less digits than its factorization.

28007314638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280599.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 28007314638 in words is "twenty-eight billion, seven million, three hundred fourteen thousand, six hundred thirty-eight".