1800722 has 24 divisors (see below), whose sum is σ = 3396288. Its totient is φ = 700920.

The previous prime is 1800719. The next prime is 1800727. The reversal of 1800722 is 2270081.

It is a junction number, because it is equal to n+sod(n) for n = 1800694 and 1800703.

It is not an unprimeable number, because it can be changed into a prime (1800727) 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 in 11 ways as a sum of consecutive naturals, for example, 1163 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (141512).

2^1800722 is an apocalyptic number.

1800722 is a deficient number, since it is larger than the sum of its proper divisors (1595566).

1800722 is a wasteful number, since it uses less digits than its factorization.

1800722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1800722 is about 1341.9098330365. The cubic root of 1800722 is about 121.6603019960.

It can be divided in two parts, 1800 and 722, that multiplied together give a square (1299600 = 1140²).

The spelling of 1800722 in words is "one million, eight hundred thousand, seven hundred twenty-two".