28784157167 has 4 divisors (see below), whose sum is σ = 28898835336. Its totient is φ = 28669479000.

The previous prime is 28784157097. The next prime is 28784157191. The reversal of 28784157167 is 76175148782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76175148782 = 2 ⋅38087574391.

It is a cyclic number.

It is not a de Polignac number, because 28784157167 - 2⁸ = 28784156911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28784154167) 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, 57338708 + ... + 57339209.

It is an arithmetic number, because the mean of its divisors is an integer number (7224708834).

Almost surely, 2^28784157167 is an apocalyptic number.

28784157167 is a deficient number, since it is larger than the sum of its proper divisors (114678169).

28784157167 is a wasteful number, since it uses less digits than its factorization.

28784157167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114678168.

The product of its digits is 5268480, while the sum is 56.

The spelling of 28784157167 in words is "twenty-eight billion, seven hundred eighty-four million, one hundred fifty-seven thousand, one hundred sixty-seven".