4028669 has 4 divisors (see below), whose sum is σ = 4036896. Its totient is φ = 4020444.

The previous prime is 4028663. The next prime is 4028681. The reversal of 4028669 is 9668204.

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 4028669 - 2⁸ = 4028413 is a prime.

It is a super-2 number, since 2×4028669² = 32460347823122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028663) 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, 3329 + ... + 4374.

It is an arithmetic number, because the mean of its divisors is an integer number (1009224).

Almost surely, 2^4028669 is an apocalyptic number.

It is an amenable number.

4028669 is a deficient number, since it is larger than the sum of its proper divisors (8227).

4028669 is an equidigital number, since it uses as much as digits as its factorization.

4028669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8226.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 4028669 is about 2007.1544534490. The cubic root of 4028669 is about 159.1184460831.

The spelling of 4028669 in words is "four million, twenty-eight thousand, six hundred sixty-nine".