28078603642 has 8 divisors (see below), whose sum is σ = 43949118816. Its totient is φ = 13428897372.

The previous prime is 28078603627. The next prime is 28078603643. The reversal of 28078603642 is 24630687082.

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

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 610404427 = 28078603642 / (2 + 8 + 0 + 7 + 8 + 6 + 0 + 3 + 6 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 28078603592 and 28078603601.

It is not an unprimeable number, because it can be changed into a prime (28078603643) 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, 305202168 + ... + 305202259.

It is an arithmetic number, because the mean of its divisors is an integer number (5493639852).

Almost surely, 2^28078603642 is an apocalyptic number.

28078603642 is a deficient number, since it is larger than the sum of its proper divisors (15870515174).

28078603642 is a wasteful number, since it uses less digits than its factorization.

28078603642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610404452.

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 28078603642 in words is "twenty-eight billion, seventy-eight million, six hundred three thousand, six hundred forty-two".