2640065390 has 32 divisors (see below), whose sum is σ = 5004961920. Its totient is φ = 999899424.

The previous prime is 2640065251. The next prime is 2640065423. The reversal of 2640065390 is 935600462.

It is a super-3 number, since 3×2640065390³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2640065390.

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, 583517 + ... + 588023.

It is an arithmetic number, because the mean of its divisors is an integer number (156405060).

Almost surely, 2^2640065390 is an apocalyptic number.

2640065390 is a deficient number, since it is larger than the sum of its proper divisors (2364896530).

2640065390 is a wasteful number, since it uses less digits than its factorization.

2640065390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7616.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 2640065390 is about 51381.5666362948. The cubic root of 2640065390 is about 1382.0960568316.

The spelling of 2640065390 in words is "two billion, six hundred forty million, sixty-five thousand, three hundred ninety".