1820744 has 8 divisors (see below), whose sum is σ = 3413910. Its totient is φ = 910368.

The previous prime is 1820743. The next prime is 1820747. The reversal of 1820744 is 4470281.

It can be written as a sum of positive squares in only one way, i.e., 940900 + 879844 = 970^2 + 938^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1820743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113789 + ... + 113804.

2^1820744 is an apocalyptic number.

It is an amenable number.

1820744 is a deficient number, since it is larger than the sum of its proper divisors (1593166).

1820744 is a wasteful number, since it uses less digits than its factorization.

1820744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227599 (or 227595 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 1820744 is about 1349.3494728943. The cubic root of 1820744 is about 122.1095495450.

It can be divided in two parts, 18207 and 44, that multiplied together give a palindrome (801108).

The spelling of 1820744 in words is "one million, eight hundred twenty thousand, seven hundred forty-four".