2811328840 has 16 divisors (see below), whose sum is σ = 6325489980. Its totient is φ = 1124531520.

The previous prime is 2811328823. The next prime is 2811328853. The reversal of 2811328840 is 488231182.

It can be written as a sum of positive squares in 2 ways, for example, as 2808788004 + 2540836 = 52998^2 + 1594^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2811328840.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35141571 + ... + 35141650.

Almost surely, 2^2811328840 is an apocalyptic number.

2811328840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2811328840 is an abundant number, since it is smaller than the sum of its proper divisors (3514161140).

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

2811328840 is a wasteful number, since it uses less digits than its factorization.

2811328840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70283232 (or 70283228 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 2811328840 is about 53021.9656368943. The cubic root of 2811328840 is about 1411.3580865629.

It can be divided in two parts, 28113 and 28840, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 2811328840 in words is "two billion, eight hundred eleven million, three hundred twenty-eight thousand, eight hundred forty".