4288821 has 8 divisors (see below), whose sum is σ = 5783040. Its totient is φ = 2826912.

The previous prime is 4288807. The next prime is 4288847. The reversal of 4288821 is 1288824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4288821 - 2⁵ = 4288789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4288021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7765 + ... + 8298.

It is an arithmetic number, because the mean of its divisors is an integer number (722880).

Almost surely, 2^4288821 is an apocalyptic number.

It is an amenable number.

4288821 is a deficient number, since it is larger than the sum of its proper divisors (1494219).

4288821 is a wasteful number, since it uses less digits than its factorization.

4288821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16155.

The product of its digits is 8192, while the sum is 33.

The square root of 4288821 is about 2070.9468848814. The cubic root of 4288821 is about 162.4722919227.

The spelling of 4288821 in words is "four million, two hundred eighty-eight thousand, eight hundred twenty-one".