2640757338 has 24 divisors (see below), whose sum is σ = 5725556928. Its totient is φ = 879649992.

The previous prime is 2640757333. The next prime is 2640757367. The reversal of 2640757338 is 8337570462.

2640757338 is a `hidden beast` number, since 2 + 6 + 40 + 7 + 573 + 38 = 666.

2640757338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2640757293 and 2640757302.

It is not an unprimeable number, because it can be changed into a prime (2640757333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22770 + ... + 76157.

It is an arithmetic number, because the mean of its divisors is an integer number (238564872).

Almost surely, 2^2640757338 is an apocalyptic number.

2640757338 is an abundant number, since it is smaller than the sum of its proper divisors (3084799590).

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

2640757338 is a wasteful number, since it uses less digits than its factorization.

2640757338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100418 (or 100415 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The square root of 2640757338 is about 51388.2996216065. The cubic root of 2640757338 is about 1382.2167931169.

The spelling of 2640757338 in words is "two billion, six hundred forty million, seven hundred fifty-seven thousand, three hundred thirty-eight".