2143334440 has 32 divisors (see below), whose sum is σ = 5193465480. Its totient is φ = 791384832.

The previous prime is 2143334399. The next prime is 2143334447. The reversal of 2143334440 is 444333412.

It can be written as a sum of positive squares in 4 ways, for example, as 933546916 + 1209787524 = 30554^2 + 34782^2 .

It is a super-2 number, since 2×2143334440² = 9187765043380227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2143334399 and 2143334408.

It is not an unprimeable number, because it can be changed into a prime (2143334447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2060379 + ... + 2061418.

Almost surely, 2^2143334440 is an apocalyptic number.

2143334440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143334440 is an abundant number, since it is smaller than the sum of its proper divisors (3050131040).

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

2143334440 is a wasteful number, since it uses less digits than its factorization.

2143334440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121821 (or 4121817 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

The square root of 2143334440 is about 46296.1600999478. The cubic root of 2143334440 is about 1289.3277028881.

Adding to 2143334440 its reverse (444333412), we get a palindrome (2587667852).

The spelling of 2143334440 in words is "two billion, one hundred forty-three million, three hundred thirty-four thousand, four hundred forty".