28315961806 has 8 divisors (see below), whose sum is σ = 46335210264. Its totient is φ = 12870891720.

The previous prime is 28315961803. The next prime is 28315961809. The reversal of 28315961806 is 60816951382.

It is an interprime number because it is at equal distance from previous prime (28315961803) and next prime (28315961809).

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

It is a self number, because there is not a number n which added to its sum of digits gives 28315961806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315961803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643544565 + ... + 643544608.

It is an arithmetic number, because the mean of its divisors is an integer number (5791901283).

Almost surely, 2^28315961806 is an apocalyptic number.

28315961806 is a deficient number, since it is larger than the sum of its proper divisors (18019248458).

28315961806 is a wasteful number, since it uses less digits than its factorization.

28315961806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287089186.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 28315961806 in words is "twenty-eight billion, three hundred fifteen million, nine hundred sixty-one thousand, eight hundred six".