28146669 has 4 divisors (see below), whose sum is σ = 37528896. Its totient is φ = 18764444.

The previous prime is 28146661. The next prime is 28146689. The reversal of 28146669 is 96664182.

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 28146669 - 2³ = 28146661 is a prime.

It is a super-2 number, since 2×28146669² = 1584469951591122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28146669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28146661) 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, 4691109 + ... + 4691114.

It is an arithmetic number, because the mean of its divisors is an integer number (9382224).

Almost surely, 2^28146669 is an apocalyptic number.

It is an amenable number.

28146669 is a deficient number, since it is larger than the sum of its proper divisors (9382227).

28146669 is an equidigital number, since it uses as much as digits as its factorization.

28146669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9382226.

The product of its digits is 124416, while the sum is 42.

The square root of 28146669 is about 5305.3434384590. The cubic root of 28146669 is about 304.1881806096.

The spelling of 28146669 in words is "twenty-eight million, one hundred forty-six thousand, six hundred sixty-nine".