28507903078 has 8 divisors (see below), whose sum is σ = 42827949072. Its totient is φ = 14231920056.

The previous prime is 28507903049. The next prime is 28507903103. The reversal of 28507903078 is 87030970582.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11014125 + ... + 11016712.

It is an arithmetic number, because the mean of its divisors is an integer number (5353493634).

Almost surely, 2^28507903078 is an apocalyptic number.

28507903078 is a deficient number, since it is larger than the sum of its proper divisors (14320045994).

28507903078 is a wasteful number, since it uses less digits than its factorization.

28507903078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22031486.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 28507903078 in words is "twenty-eight billion, five hundred seven million, nine hundred three thousand, seventy-eight".