28388947822 has 8 divisors (see below), whose sum is σ = 42585372072. Its totient is φ = 14193823800.

The previous prime is 28388947787. The next prime is 28388947823. The reversal of 28388947822 is 22874988382.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28388947823) 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, 268504 + ... + 358987.

It is an arithmetic number, because the mean of its divisors is an integer number (5323171509).

Almost surely, 2^28388947822 is an apocalyptic number.

28388947822 is a deficient number, since it is larger than the sum of its proper divisors (14196424250).

28388947822 is a wasteful number, since it uses less digits than its factorization.

28388947822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650114.

The product of its digits is 24772608, while the sum is 61.

The spelling of 28388947822 in words is "twenty-eight billion, three hundred eighty-eight million, nine hundred forty-seven thousand, eight hundred twenty-two".