2640440262 has 32 divisors (see below), whose sum is σ = 5429781504. Its totient is φ = 855489600.

The previous prime is 2640440261. The next prime is 2640440263. The reversal of 2640440262 is 2620440462.

It is an interprime number because it is at equal distance from previous prime (2640440261) and next prime (2640440263).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640440261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46863 + ... + 86469.

It is an arithmetic number, because the mean of its divisors is an integer number (169680672).

Almost surely, 2^2640440262 is an apocalyptic number.

2640440262 is an abundant number, since it is smaller than the sum of its proper divisors (2789341242).

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

2640440262 is a wasteful number, since it uses less digits than its factorization.

2640440262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39924.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 2640440262 is about 51385.2144298338. The cubic root of 2640440262 is about 1382.1614699327.

It can be divided in two parts, 26404 and 40262, that added together give a palindrome (66666).

The spelling of 2640440262 in words is "two billion, six hundred forty million, four hundred forty thousand, two hundred sixty-two".