1802836 has 36 divisors (see below), whose sum is σ = 3781344. Its totient is φ = 736560.

The previous prime is 1802821. The next prime is 1802837. The reversal of 1802836 is 6382081.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1802837) 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, 26875 + ... + 26941.

2^1802836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1802836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1890672).

1802836 is an abundant number, since it is smaller than the sum of its proper divisors (1978508).

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

1802836 is a wasteful number, since it uses less digits than its factorization.

1802836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1802836 is about 1342.6972853179. The cubic root of 1802836 is about 121.7078920366.

The spelling of 1802836 in words is "one million, eight hundred two thousand, eight hundred thirty-six".