1644416344 has 16 divisors (see below), whose sum is σ = 3092171400. Its totient is φ = 819837312.

The previous prime is 1644416329. The next prime is 1644416369. The reversal of 1644416344 is 4436144461.

It is a super-2 number, since 2×1644416344² = 5408210224828652672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293409 + ... + 298960.

Almost surely, 2^1644416344 is an apocalyptic number.

It is an amenable number.

1644416344 is a deficient number, since it is larger than the sum of its proper divisors (1447755056).

1644416344 is a wasteful number, since it uses less digits than its factorization.

1644416344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592722 (or 592718 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The square root of 1644416344 is about 40551.4037241623. The cubic root of 1644416344 is about 1180.3313117368.

The spelling of 1644416344 in words is "one billion, six hundred forty-four million, four hundred sixteen thousand, three hundred forty-four".