28378667307 has 8 divisors (see below), whose sum is σ = 40064000976. Its totient is φ = 17806222592.

The previous prime is 28378667281. The next prime is 28378667363. The reversal of 28378667307 is 70376687382.

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 28378667307 - 2⁷ = 28378667179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28378667377) 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, 278222178 + ... + 278222279.

It is an arithmetic number, because the mean of its divisors is an integer number (5008000122).

Almost surely, 2^28378667307 is an apocalyptic number.

28378667307 is a deficient number, since it is larger than the sum of its proper divisors (11685333669).

28378667307 is a wasteful number, since it uses less digits than its factorization.

28378667307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556444477.

The product of its (nonzero) digits is 14224896, while the sum is 57.

The spelling of 28378667307 in words is "twenty-eight billion, three hundred seventy-eight million, six hundred sixty-seven thousand, three hundred seven".