811630 has 8 divisors (see below), whose sum is σ = 1460952. Its totient is φ = 324648.

The previous prime is 811627. The next prime is 811637. The reversal of 811630 is 36118.

811630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 811598 and 811607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40572 + ... + 40591.

It is an arithmetic number, because the mean of its divisors is an integer number (182619).

2⁸¹¹⁶³⁰ is an apocalyptic number.

811630 is a deficient number, since it is larger than the sum of its proper divisors (649322).

811630 is a wasteful number, since it uses less digits than its factorization.

811630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81170.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 811630 is about 900.9051004407. The cubic root of 811630 is about 93.2794615417.

Adding to 811630 its reverse (36118), we get a palindrome (847748).

It can be divided in two parts, 811 and 630, that added together give a palindrome (1441).

The spelling of 811630 in words is "eight hundred eleven thousand, six hundred thirty".