28367669 has 4 divisors (see below), whose sum is σ = 30946560. Its totient is φ = 25788780.

The previous prime is 28367653. The next prime is 28367681. The reversal of 28367669 is 96676382.

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 28367669 - 2⁴ = 28367653 is a prime.

It is a super-2 number, since 2×28367669² = 1609449288987122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28367639) 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, 1289429 + ... + 1289450.

It is an arithmetic number, because the mean of its divisors is an integer number (7736640).

Almost surely, 2^28367669 is an apocalyptic number.

It is an amenable number.

28367669 is a deficient number, since it is larger than the sum of its proper divisors (2578891).

28367669 is a wasteful number, since it uses less digits than its factorization.

28367669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578890.

The product of its digits is 653184, while the sum is 47.

The square root of 28367669 is about 5326.1307719582. The cubic root of 28367669 is about 304.9822402989.

The spelling of 28367669 in words is "twenty-eight million, three hundred sixty-seven thousand, six hundred sixty-nine".