1800402 has 32 divisors (see below), whose sum is σ = 4017600. Its totient is φ = 534528.

The previous prime is 1800401. The next prime is 1800413. The reversal of 1800402 is 2040081.

It is not an unprimeable number, because it can be changed into a prime (1800401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1474 + ... + 2402.

It is an arithmetic number, because the mean of its divisors is an integer number (125550).

2^1800402 is an apocalyptic number.

1800402 is an abundant number, since it is smaller than the sum of its proper divisors (2217198).

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

1800402 is a wasteful number, since it uses less digits than its factorization.

1800402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1800402 is about 1341.7905946905. The cubic root of 1800402 is about 121.6530949604.

Adding to 1800402 its reverse (2040081), we get a palindrome (3840483).

The spelling of 1800402 in words is "one million, eight hundred thousand, four hundred two".