1797644 has 6 divisors (see below), whose sum is σ = 3145884. Its totient is φ = 898820.

The previous prime is 1797641. The next prime is 1797667. The reversal of 1797644 is 4467971.

It is a d-powerful number, because it can be written as 1 + 7² + 9 + 7⁶ + 6⁸ + 4³ + 4⁴ .

It is a junction number, because it is equal to n+sod(n) for n = 1797598 and 1797607.

It is not an unprimeable number, because it can be changed into a prime (1797641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224702 + ... + 224709.

It is an arithmetic number, because the mean of its divisors is an integer number (524314).

2^1797644 is an apocalyptic number.

It is an amenable number.

1797644 is a deficient number, since it is larger than the sum of its proper divisors (1348240).

1797644 is a wasteful number, since it uses less digits than its factorization.

1797644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449415 (or 449413 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 1797644 is about 1340.7624696418. The cubic root of 1797644 is about 121.5909438951.

The spelling of 1797644 in words is "one million, seven hundred ninety-seven thousand, six hundred forty-four".