28378346345 has 8 divisors (see below), whose sum is σ = 34055017920. Its totient is φ = 22702008880.

The previous prime is 28378346329. The next prime is 28378346351. The reversal of 28378346345 is 54364387382.

It is a happy number.

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

It is not a de Polignac number, because 28378346345 - 2⁴ = 28378346329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177500 + ... + 297090.

It is an arithmetic number, because the mean of its divisors is an integer number (4256877240).

Almost surely, 2^28378346345 is an apocalyptic number.

It is an amenable number.

28378346345 is a deficient number, since it is larger than the sum of its proper divisors (5676671575).

28378346345 is a wasteful number, since it uses less digits than its factorization.

28378346345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167055.

The product of its digits is 11612160, while the sum is 53.

The spelling of 28378346345 in words is "twenty-eight billion, three hundred seventy-eight million, three hundred forty-six thousand, three hundred forty-five".