28631167 has 4 divisors (see below), whose sum is σ = 28898856. Its totient is φ = 28363480.

The previous prime is 28631153. The next prime is 28631171. The reversal of 28631167 is 76113682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76113682 = 2 ⋅38056841.

It is a cyclic number.

It is not a de Polignac number, because 28631167 - 2¹⁹ = 28106879 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 (28631117) 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, 133684 + ... + 133897.

It is an arithmetic number, because the mean of its divisors is an integer number (7224714).

Almost surely, 2^28631167 is an apocalyptic number.

28631167 is a deficient number, since it is larger than the sum of its proper divisors (267689).

28631167 is a wasteful number, since it uses less digits than its factorization.

28631167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267688.

The product of its digits is 12096, while the sum is 34.

The square root of 28631167 is about 5350.8099386915. The cubic root of 28631167 is about 305.9236249791.

The spelling of 28631167 in words is "twenty-eight million, six hundred thirty-one thousand, one hundred sixty-seven".