2811113892 has 18 divisors (see below), whose sum is σ = 7105871318. Its totient is φ = 937037952.

The previous prime is 2811113867. The next prime is 2811113957. The reversal of 2811113892 is 2983111182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2790374976 + 20738916 = 52824^2 + 4554^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×2811113892² = 15804722627590775328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 78086497 = 2811113892 / (2 + 8 + 1 + 1 + 1 + 1 + 3 + 8 + 9 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39043213 + ... + 39043284.

Almost surely, 2^2811113892 is an apocalyptic number.

It is an amenable number.

2811113892 is an abundant number, since it is smaller than the sum of its proper divisors (4294757426).

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

2811113892 is a wasteful number, since it uses less digits than its factorization.

2811113892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78086507 (or 78086502 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 2811113892 is about 53019.9386268977. The cubic root of 2811113892 is about 1411.3221158710.

The spelling of 2811113892 in words is "two billion, eight hundred eleven million, one hundred thirteen thousand, eight hundred ninety-two".