4644809 has 4 divisors (see below), whose sum is σ = 5002116. Its totient is φ = 4287504.

The previous prime is 4644799. The next prime is 4644811. The reversal of 4644809 is 9084464.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 644809 + 4000000 = 803^2 + 2000^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4644809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4644839) 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, 178634 + ... + 178659.

It is an arithmetic number, because the mean of its divisors is an integer number (1250529).

Almost surely, 2^4644809 is an apocalyptic number.

It is an amenable number.

4644809 is a deficient number, since it is larger than the sum of its proper divisors (357307).

4644809 is a wasteful number, since it uses less digits than its factorization.

4644809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357306.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 4644809 is about 2155.1818948757. The cubic root of 4644809 is about 166.8486203959.

It can be divided in two parts, 4 and 644809, that multiplied together give a square (2579236 = 1606²).

The spelling of 4644809 in words is "four million, six hundred forty-four thousand, eight hundred nine".