1800036 has 48 divisors (see below), whose sum is σ = 5335680. Its totient is φ = 514080.

The previous prime is 1800017. The next prime is 1800037. The reversal of 1800036 is 6300081.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1799991 and 1800018.

It is not an unprimeable number, because it can be changed into a prime (1800037) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 435 + ... + 1946.

It is an arithmetic number, because the mean of its divisors is an integer number (111160).

2^1800036 is an apocalyptic number.

It is an amenable number.

1800036 is an abundant number, since it is smaller than the sum of its proper divisors (3535644).

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

1800036 is a wasteful number, since it uses less digits than its factorization.

1800036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1800036 is about 1341.6542028407. The cubic root of 1800036 is about 121.6448508663.

The spelling of 1800036 in words is "one million, eight hundred thousand, thirty-six".