28778704167 has 8 divisors (see below), whose sum is σ = 40628758896. Its totient is φ = 18057226112.

The previous prime is 28778704147. The next prime is 28778704183. The reversal of 28778704167 is 76140787782.

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

It is a cyclic number.

It is not a de Polignac number, because 28778704167 - 2⁸ = 28778703911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28778704117) 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, 282144108 + ... + 282144209.

It is an arithmetic number, because the mean of its divisors is an integer number (5078594862).

Almost surely, 2^28778704167 is an apocalyptic number.

28778704167 is a deficient number, since it is larger than the sum of its proper divisors (11850054729).

28778704167 is a wasteful number, since it uses less digits than its factorization.

28778704167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564288337.

The product of its (nonzero) digits is 7375872, while the sum is 57.

The spelling of 28778704167 in words is "twenty-eight billion, seven hundred seventy-eight million, seven hundred four thousand, one hundred sixty-seven".