28767917 has 4 divisors (see below), whose sum is σ = 30018720. Its totient is φ = 27517116.

The previous prime is 28767911. The next prime is 28767941. The reversal of 28767917 is 71976782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28767917 - 2¹⁸ = 28505773 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 (28767911) 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, 625367 + ... + 625412.

It is an arithmetic number, because the mean of its divisors is an integer number (7504680).

Almost surely, 2^28767917 is an apocalyptic number.

It is an amenable number.

28767917 is a deficient number, since it is larger than the sum of its proper divisors (1250803).

28767917 is a wasteful number, since it uses less digits than its factorization.

28767917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250802.

The product of its digits is 296352, while the sum is 47.

The square root of 28767917 is about 5363.5731560220. The cubic root of 28767917 is about 306.4099088809.

The spelling of 28767917 in words is "twenty-eight million, seven hundred sixty-seven thousand, nine hundred seventeen".