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BaseRepresentation
bin11100001010
32110202
4130022
524202
612202
75153
oct3412
92422
101802
111399
121062
13a88
1492a
15802
hex70a

1802 has 8 divisors (see below), whose sum is σ = 2916. Its totient is φ = 832.

The previous prime is 1801. The next prime is 1811. The reversal of 1802 is 2081.

1802 = T28 + T29 + ... + T31.

It can be written as a sum of positive squares in 2 ways, for example, as 1681 + 121 = 41^2 + 11^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 11.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8 + ... + 60.

21802 is an apocalyptic number.

1802 is a deficient number, since it is larger than the sum of its proper divisors (1114).

1802 is a wasteful number, since it uses less digits than its factorization.

1802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1802 is about 42.4499705536. The cubic root of 1802 is about 12.1689076583.

Adding to 1802 its reverse (2081), we get a palindrome (3883).

The spelling of 1802 in words is "one thousand, eight hundred two".

Divisors: 1 2 17 34 53 106 901 1802