28978604719 has 4 divisors (see below), whose sum is σ = 30683228544. Its totient is φ = 27273980896.

The previous prime is 28978604687. The next prime is 28978604729. The reversal of 28978604719 is 91740687982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28978604719 - 2⁵ = 28978604687 is a prime.

It is a super-2 number, since 2×28978604719² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28978604729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852311887 + ... + 852311920.

It is an arithmetic number, because the mean of its divisors is an integer number (7670807136).

Almost surely, 2^28978604719 is an apocalyptic number.

28978604719 is a deficient number, since it is larger than the sum of its proper divisors (1704623825).

28978604719 is a wasteful number, since it uses less digits than its factorization.

28978604719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704623824.

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 28978604719 in words is "twenty-eight billion, nine hundred seventy-eight million, six hundred four thousand, seven hundred nineteen".