801090 has 80 divisors (see below), whose sum is σ = 2299968. Its totient is φ = 199584.

The previous prime is 801079. The next prime is 801103. The reversal of 801090 is 90108.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

801090 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 in 39 ways as a sum of consecutive naturals, for example, 18609 + ... + 18651.

2⁸⁰¹⁰⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 801090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149984).

801090 is an abundant number, since it is smaller than the sum of its proper divisors (1498878).

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

801090 is a wasteful number, since it uses less digits than its factorization.

801090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 801090 is about 895.0363121125. The cubic root of 801090 is about 92.8739186371.

Adding to 801090 its sum of digits (18), we get a palindrome (801108).

Adding to 801090 its reverse (90108), we get a palindrome (891198).

It can be divided in two parts, 8010 and 90, that added together give a square (8100 = 90²).

The spelling of 801090 in words is "eight hundred one thousand, ninety".