1803402 has 12 divisors (see below), whose sum is σ = 3907410. Its totient is φ = 601128.

The previous prime is 1803383. The next prime is 1803419. The reversal of 1803402 is 2043081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1718721 + 84681 = 1311^2 + 291^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 100189 = 1803402 / (1 + 8 + 0 + 3 + 4 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50077 + ... + 50112.

2^1803402 is an apocalyptic number.

1803402 is an abundant number, since it is smaller than the sum of its proper divisors (2104008).

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

1803402 is a wasteful number, since it uses less digits than its factorization.

1803402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100197 (or 100194 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1803402 is about 1342.9080385492. The cubic root of 1803402 is about 121.7206274267.

Adding to 1803402 its reverse (2043081), we get a palindrome (3846483).

The spelling of 1803402 in words is "one million, eight hundred three thousand, four hundred two".