801690 has 16 divisors (see below), whose sum is σ = 1924128. Its totient is φ = 213776.

The previous prime is 801683. The next prime is 801701. The reversal of 801690 is 96108.

It is a super-2 number, since 2×801690² = 1285413712200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 801690.

It is an unprimeable number.

801690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13332 + ... + 13391.

It is an arithmetic number, because the mean of its divisors is an integer number (120258).

2⁸⁰¹⁶⁹⁰ is an apocalyptic number.

801690 is an abundant number, since it is smaller than the sum of its proper divisors (1122438).

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

801690 is a wasteful number, since it uses less digits than its factorization.

801690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26733.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 801690 is about 895.3714313066. The cubic root of 801690 is about 92.8970997382.

Adding to 801690 its reverse (96108), we get a palindrome (897798).

It can be divided in two parts, 80 and 1690, that added together give a triangular number (1770 = T₅₉).

The spelling of 801690 in words is "eight hundred one thousand, six hundred ninety".