2243142440 has 64 divisors (see below), whose sum is σ = 6292460160. Its totient is φ = 699160320.

The previous prime is 2243142439. The next prime is 2243142449. The reversal of 2243142440 is 442413422.

It is a happy number.

It is a super-2 number, since 2×2243142440² = 10063376012258307200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2243142449) 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, 361067 + ... + 367226.

It is an arithmetic number, because the mean of its divisors is an integer number (98319690).

Almost surely, 2^2243142440 is an apocalyptic number.

2243142440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2243142440 is an abundant number, since it is smaller than the sum of its proper divisors (4049317720).

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

2243142440 is a wasteful number, since it uses less digits than its factorization.

2243142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728322 (or 728318 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 2243142440 is about 47361.8247114699. The cubic root of 2243142440 is about 1309.0380911338.

Adding to 2243142440 its reverse (442413422), we get a palindrome (2685555862).

The spelling of 2243142440 in words is "two billion, two hundred forty-three million, one hundred forty-two thousand, four hundred forty".