3644273 has 6 divisors (see below), whose sum is σ = 3866994. Its totient is φ = 3422496.

The previous prime is 3644237. The next prime is 3644279. The reversal of 3644273 is 3724463.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3429904 + 214369 = 1852^2 + 463^2 .

It is not a de Polignac number, because 3644273 - 2¹⁴ = 3627889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3644279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7640 + ... + 8102.

It is an arithmetic number, because the mean of its divisors is an integer number (644499).

Almost surely, 2^3644273 is an apocalyptic number.

It is an amenable number.

3644273 is a deficient number, since it is larger than the sum of its proper divisors (222721).

3644273 is an frugal number, since it uses more digits than its factorization.

3644273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943 (or 480 counting only the distinct ones).

The product of its digits is 12096, while the sum is 29.

The square root of 3644273 is about 1908.9979046610. The cubic root of 3644273 is about 153.8876028127.

The spelling of 3644273 in words is "three million, six hundred forty-four thousand, two hundred seventy-three".