811056240 has 140 divisors (see below), whose sum is σ = 2827468584. Its totient is φ = 216266112.

The previous prime is 811056221. The next prime is 811056241. The reversal of 811056240 is 42650118.

811056240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811056241) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 51367 + ... + 65273.

Almost surely, 2^811056240 is an apocalyptic number.

811056240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 811056240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1413734292).

811056240 is an abundant number, since it is smaller than the sum of its proper divisors (2016412344).

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

811056240 is a wasteful number, since it uses less digits than its factorization.

811056240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13938 (or 13917 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 811056240 is about 28479.0491414303. The cubic root of 811056240 is about 932.5747589128.

The spelling of 811056240 in words is "eight hundred eleven million, fifty-six thousand, two hundred forty".