28778222463 has 8 divisors (see below), whose sum is σ = 38856672000. Its totient is φ = 18942627288.

The previous prime is 28778222411. The next prime is 28778222477. The reversal of 28778222463 is 36422287782.

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

It is not a de Polignac number, because 28778222463 - 2⁹ = 28778221951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28778222663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60713313 + ... + 60713786.

It is an arithmetic number, because the mean of its divisors is an integer number (4857084000).

Almost surely, 2^28778222463 is an apocalyptic number.

28778222463 is a deficient number, since it is larger than the sum of its proper divisors (10078449537).

28778222463 is a wasteful number, since it uses less digits than its factorization.

28778222463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121427181.

The product of its digits is 3612672, while the sum is 51.

The spelling of 28778222463 in words is "twenty-eight billion, seven hundred seventy-eight million, two hundred twenty-two thousand, four hundred sixty-three".