2311445890 has 32 divisors (see below), whose sum is σ = 4496894640. Its totient is φ = 850362624.

The previous prime is 2311445867. The next prime is 2311445897. The reversal of 2311445890 is 985441132.

It can be written as a sum of positive squares in 8 ways, for example, as 406385281 + 1905060609 = 20159^2 + 43647^2 .

It is not an unprimeable number, because it can be changed into a prime (2311445897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3916 + ... + 68104.

Almost surely, 2^2311445890 is an apocalyptic number.

2311445890 is a deficient number, since it is larger than the sum of its proper divisors (2185448750).

2311445890 is a wasteful number, since it uses less digits than its factorization.

2311445890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64486.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 2311445890 is about 48077.4987910145. The cubic root of 2311445890 is about 1322.1921582218.

The spelling of 2311445890 in words is "two billion, three hundred eleven million, four hundred forty-five thousand, eight hundred ninety".