1644652 has 12 divisors (see below), whose sum is σ = 2895480. Its totient is φ = 817376.

The previous prime is 1644641. The next prime is 1644653. The reversal of 1644652 is 2564461.

It is a super-2 number, since 2×1644652² = 5409760402208, which contains 22 as substring.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1644652.

It is not an unprimeable number, because it can be changed into a prime (1644653) 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, 433 + ... + 1864.

It is an arithmetic number, because the mean of its divisors is an integer number (241290).

2^1644652 is an apocalyptic number.

It is an amenable number.

1644652 is a deficient number, since it is larger than the sum of its proper divisors (1250828).

1644652 is a wasteful number, since it uses less digits than its factorization.

1644652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480 (or 2478 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 1644652 is about 1282.4398621378. The cubic root of 1644652 is about 118.0387692201.

The spelling of 1644652 in words is "one million, six hundred forty-four thousand, six hundred fifty-two".