28378346673 has 8 divisors (see below), whose sum is σ = 37844294688. Its totient is φ = 18915648224.

The previous prime is 28378346663. The next prime is 28378346683. The reversal of 28378346673 is 37664387382.

It is an interprime number because it is at equal distance from previous prime (28378346663) and next prime (28378346683).

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 28378346673 - 2⁵ = 28378346641 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28378346663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791940 + ... + 826997.

It is an arithmetic number, because the mean of its divisors is an integer number (4730536836).

Almost surely, 2^28378346673 is an apocalyptic number.

It is an amenable number.

28378346673 is a deficient number, since it is larger than the sum of its proper divisors (9465948015).

28378346673 is a wasteful number, since it uses less digits than its factorization.

28378346673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624783.

The product of its digits is 24385536, while the sum is 57.

The spelling of 28378346673 in words is "twenty-eight billion, three hundred seventy-eight million, three hundred forty-six thousand, six hundred seventy-three".