28898767 has 4 divisors (see below), whose sum is σ = 28939680. Its totient is φ = 28857856.

The previous prime is 28898743. The next prime is 28898777. The reversal of 28898767 is 76789882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28898767 - 2¹⁵ = 28865999 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 (28898777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19378 + ... + 20815.

It is an arithmetic number, because the mean of its divisors is an integer number (7234920).

Almost surely, 2^28898767 is an apocalyptic number.

28898767 is a deficient number, since it is larger than the sum of its proper divisors (40913).

28898767 is an equidigital number, since it uses as much as digits as its factorization.

28898767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40912.

The product of its digits is 2709504, while the sum is 55.

The square root of 28898767 is about 5375.7573419938. The cubic root of 28898767 is about 306.8737717011.

The spelling of 28898767 in words is "twenty-eight million, eight hundred ninety-eight thousand, seven hundred sixty-seven".