28169699 has 4 divisors (see below), whose sum is σ = 28185864. Its totient is φ = 28153536.

The previous prime is 28169693. The next prime is 28169707. The reversal of 28169699 is 99696182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99696182 = 2 ⋅49848091.

It is a cyclic number.

It is not a de Polignac number, because 28169699 - 2⁴ = 28169683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28169693) 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, 5102 + ... + 9075.

It is an arithmetic number, because the mean of its divisors is an integer number (7046466).

Almost surely, 2^28169699 is an apocalyptic number.

28169699 is a deficient number, since it is larger than the sum of its proper divisors (16165).

28169699 is a wasteful number, since it uses less digits than its factorization.

28169699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16164.

The product of its digits is 419904, while the sum is 50.

The square root of 28169699 is about 5307.5134479340. The cubic root of 28169699 is about 304.2711216735.

The spelling of 28169699 in words is "twenty-eight million, one hundred sixty-nine thousand, six hundred ninety-nine".