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BaseRepresentation
bin1100100010
31002201
430202
511202
63414
72224
oct1442
91081
10802
1166a
1256a
13499
14414
15387
hex322

802 has 4 divisors (see below), whose sum is σ = 1206. Its totient is φ = 400.

The previous prime is 797. The next prime is 809. The reversal of 802 is 208.

802 = T18 + T19 + ... + T21.

It is a happy number.

802 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 441 + 361 = 21^2 + 19^2 .

802 is an undulating number in base 14.

It is a plaindrome in base 7, base 11, base 12 and base 13.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (809) by changing a digit.

802 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199 + ... + 202.

802 is a deficient number, since it is larger than the sum of its proper divisors (404).

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

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

The sum of its prime factors is 403.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 802 is about 28.3196045170. The cubic root of 802 is about 9.2909072109.

Adding to 802 its product of nonzero digits (16), we get a palindrome (818).

The spelling of 802 in words is "eight hundred two", and thus it is an aban number.

Divisors: 1 2 401 802