28105390678 has 8 divisors (see below), whose sum is σ = 42185626920. Its totient is φ = 14043515040.

The previous prime is 28105390637. The next prime is 28105390693. The reversal of 28105390678 is 87609350182.

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, 4586323 + ... + 4592446.

It is an arithmetic number, because the mean of its divisors is an integer number (5273203365).

Almost surely, 2^28105390678 is an apocalyptic number.

28105390678 is a deficient number, since it is larger than the sum of its proper divisors (14080236242).

28105390678 is a wasteful number, since it uses less digits than its factorization.

28105390678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9180302.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 28105390678 in words is "twenty-eight billion, one hundred five million, three hundred ninety thousand, six hundred seventy-eight".