2640343020 has 48 divisors (see below), whose sum is σ = 8449099008. Its totient is φ = 603506880.

The previous prime is 2640343003. The next prime is 2640343033. The reversal of 2640343020 is 203430462.

It is a happy number.

It is a super-2 number, since 2×2640343020² = 13942822526525440800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3142846 + ... + 3143685.

It is an arithmetic number, because the mean of its divisors is an integer number (176022896).

Almost surely, 2^2640343020 is an apocalyptic number.

2640343020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640343020 is an abundant number, since it is smaller than the sum of its proper divisors (5808755988).

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

2640343020 is a wasteful number, since it uses less digits than its factorization.

2640343020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6286550 (or 6286548 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 2640343020 is about 51384.2682150870. The cubic root of 2640343020 is about 1382.1445023335.

Adding to 2640343020 its reverse (203430462), we get a palindrome (2843773482).

The spelling of 2640343020 in words is "two billion, six hundred forty million, three hundred forty-three thousand, twenty".