28664749071839 has 8 divisors (see below), whose sum is σ = 30173470470000. Its totient is φ = 27156032713152.

The previous prime is 28664749071821. The next prime is 28664749071863. The reversal of 28664749071839 is 93817094746682.

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

It is a cyclic number.

It is not a de Polignac number, because 28664749071839 - 2¹² = 28664749067743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28664749076839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17841347 + ... + 19381515.

It is an arithmetic number, because the mean of its divisors is an integer number (3771683808750).

Almost surely, 2^{28664749071839} is an apocalyptic number.

28664749071839 is a deficient number, since it is larger than the sum of its proper divisors (1508721398161).

28664749071839 is a wasteful number, since it uses less digits than its factorization.

28664749071839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519737.

The product of its (nonzero) digits is 877879296, while the sum is 74.

The spelling of 28664749071839 in words is "twenty-eight trillion, six hundred sixty-four billion, seven hundred forty-nine million, seventy-one thousand, eight hundred thirty-nine".