2640740212 has 48 divisors (see below), whose sum is σ = 5099552640. Its totient is φ = 1186572800.

The previous prime is 2640740197. The next prime is 2640740233. The reversal of 2640740212 is 2120470462.

It is a happy number.

It is a congruent number.

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, 1693089 + ... + 1694647.

It is an arithmetic number, because the mean of its divisors is an integer number (106240680).

Almost surely, 2^2640740212 is an apocalyptic number.

2640740212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2640740212 is a deficient number, since it is larger than the sum of its proper divisors (2458812428).

2640740212 is a wasteful number, since it uses less digits than its factorization.

2640740212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992 (or 1990 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 2640740212 is about 51388.1329880742. The cubic root of 2640740212 is about 1382.2138050983.

The spelling of 2640740212 in words is "two billion, six hundred forty million, seven hundred forty thousand, two hundred twelve".