4288869 has 20 divisors (see below), whose sum is σ = 6901356. Its totient is φ = 2638656.

The previous prime is 4288847. The next prime is 4288873. The reversal of 4288869 is 9688824.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 544644 + 3744225 = 738^2 + 1935^2 .

It is not a de Polignac number, because 4288869 - 2¹⁵ = 4256101 is a prime.

It is a super-2 number, since 2×4288869² = 36788794598322, which contains 22 as substring.

It is an Ulam 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 (4281869) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 984 + ... + 3089.

Almost surely, 2^4288869 is an apocalyptic number.

It is an amenable number.

4288869 is a deficient number, since it is larger than the sum of its proper divisors (2612487).

4288869 is a wasteful number, since it uses less digits than its factorization.

4288869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098 (or 4089 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 4288869 is about 2070.9584737507. The cubic root of 4288869 is about 162.4728980443.

Subtracting from 4288869 its sum of digits (45), we obtain a palindrome (4288824).

The spelling of 4288869 in words is "four million, two hundred eighty-eight thousand, eight hundred sixty-nine".