2143440040 has 64 divisors (see below), whose sum is σ = 5568595200. Its totient is φ = 727308288.

The previous prime is 2143440031. The next prime is 2143440043. The reversal of 2143440040 is 400443412.

It is a junction number, because it is equal to n+sod(n) for n = 2143439993 and 2143440020.

It is not an unprimeable number, because it can be changed into a prime (2143440043) 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, 12300 + ... + 66619.

It is an arithmetic number, because the mean of its divisors is an integer number (87009300).

Almost surely, 2^2143440040 is an apocalyptic number.

2143440040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143440040 is an abundant number, since it is smaller than the sum of its proper divisors (3425155160).

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

2143440040 is a wasteful number, since it uses less digits than its factorization.

2143440040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79034 (or 79030 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 2143440040 is about 46297.3005692557. The cubic root of 2143440040 is about 1289.3488771803.

Adding to 2143440040 its reverse (400443412), we get a palindrome (2543883452).

The spelling of 2143440040 in words is "two billion, one hundred forty-three million, four hundred forty thousand, forty".