1644005352 has 64 divisors (see below), whose sum is σ = 4525632000. Its totient is φ = 493519040.

The previous prime is 1644005309. The next prime is 1644005353. The reversal of 1644005352 is 2535004461.

It is a super-3 number, since 3×1644005352³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1644005353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 852 + ... + 57347.

It is an arithmetic number, because the mean of its divisors is an integer number (70713000).

Almost surely, 2^1644005352 is an apocalyptic number.

1644005352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1644005352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2262816000).

1644005352 is an abundant number, since it is smaller than the sum of its proper divisors (2881626648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1644005352 is a wasteful number, since it uses less digits than its factorization.

1644005352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58326 (or 58322 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1644005352 is about 40546.3358640457. The cubic root of 1644005352 is about 1180.2329694184.

The spelling of 1644005352 in words is "one billion, six hundred forty-four million, five thousand, three hundred fifty-two".