1800396 has 36 divisors (see below), whose sum is σ = 4902352. Its totient is φ = 553824.

The previous prime is 1800389. The next prime is 1800397. The reversal of 1800396 is 6930081.

It is a tau number, because it is divible by the number of its divisors (36).

1800396 is a modest number, since divided by 396 gives 180 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1800397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1456 + ... + 2391.

2^1800396 is an apocalyptic number.

It is an amenable number.

1800396 is an abundant number, since it is smaller than the sum of its proper divisors (3101956).

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

1800396 is a wasteful number, since it uses less digits than its factorization.

1800396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870 (or 3865 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1800396 is about 1341.7883588704. The cubic root of 1800396 is about 121.6529598203.

The spelling of 1800396 in words is "one million, eight hundred thousand, three hundred ninety-six".