811841040 has 60 divisors (see below), whose sum is σ = 2726435244. Its totient is φ = 216490752.

The previous prime is 811841027. The next prime is 811841053. The reversal of 811841040 is 40148118.

It is an interprime number because it is at equal distance from previous prime (811841027) and next prime (811841053).

It can be written as a sum of positive squares in 2 ways, for example, as 563967504 + 247873536 = 23748^2 + 15744^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a junction number, because it is equal to n+sod(n) for n = 811840995 and 811841013.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563059 + ... + 564498.

Almost surely, 2^811841040 is an apocalyptic number.

811841040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

811841040 is an abundant number, since it is smaller than the sum of its proper divisors (1914594204).

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

811841040 is a wasteful number, since it uses less digits than its factorization.

811841040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127576 (or 1127567 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 811841040 is about 28492.8243598279. The cubic root of 811841040 is about 932.8754568167.

Adding to 811841040 its reverse (40148118), we get a palindrome (851989158).

The spelling of 811841040 in words is "eight hundred eleven million, eight hundred forty-one thousand, forty".