2011443440 has 20 divisors (see below), whose sum is σ = 4676606184. Its totient is φ = 804577344.

The previous prime is 2011443353. The next prime is 2011443457. The reversal of 2011443440 is 443441102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 12571442 + ... + 12571601.

Almost surely, 2^2011443440 is an apocalyptic number.

2011443440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011443440 is an abundant number, since it is smaller than the sum of its proper divisors (2665162744).

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

2011443440 is a wasteful number, since it uses less digits than its factorization.

2011443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25143056 (or 25143050 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2011443440 is about 44849.1186089537. The cubic root of 2011443440 is about 1262.3194531870.

Adding to 2011443440 its reverse (443441102), we get a palindrome (2454884542).

The spelling of 2011443440 in words is "two billion, eleven million, four hundred forty-three thousand, four hundred forty".