2811349640 has 32 divisors (see below), whose sum is σ = 6900586560. Its totient is φ = 1022308800.

The previous prime is 2811349637. The next prime is 2811349663. The reversal of 2811349640 is 469431182.

It is a junction number, because it is equal to n+sod(n) for n = 2811349594 and 2811349603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3194276 + ... + 3195155.

It is an arithmetic number, because the mean of its divisors is an integer number (215643330).

Almost surely, 2^2811349640 is an apocalyptic number.

2811349640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2811349640 is an abundant number, since it is smaller than the sum of its proper divisors (4089236920).

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

2811349640 is a wasteful number, since it uses less digits than its factorization.

2811349640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6389453 (or 6389449 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 2811349640 is about 53022.1617816550. The cubic root of 2811349640 is about 1411.3615672627.

The spelling of 2811349640 in words is "two billion, eight hundred eleven million, three hundred forty-nine thousand, six hundred forty".