811400 has 24 divisors (see below), whose sum is σ = 1886970. Its totient is φ = 324480.

The previous prime is 811387. The next prime is 811411. The reversal of 811400 is 4118.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 605284 + 206116 = 778^2 + 454^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1829 + ... + 2228.

2⁸¹¹⁴⁰⁰ is an apocalyptic number.

It is an amenable number.

811400 is an abundant number, since it is smaller than the sum of its proper divisors (1075570).

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

811400 is a wasteful number, since it uses less digits than its factorization.

811400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073 (or 4064 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 811400 is about 900.7774419911. Note that the first 3 decimals coincide. The cubic root of 811400 is about 93.2706495202.

Adding to 811400 its reverse (4118), we get a palindrome (815518).

The spelling of 811400 in words is "eight hundred eleven thousand, four hundred".