2640329140 has 24 divisors (see below), whose sum is σ = 5550112512. Its totient is φ = 1055099040.

The previous prime is 2640329113. The next prime is 2640329147. The reversal of 2640329140 is 419230462.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640329147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43404 + ... + 84643.

It is an arithmetic number, because the mean of its divisors is an integer number (231254688).

Almost surely, 2^2640329140 is an apocalyptic number.

2640329140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640329140 is an abundant number, since it is smaller than the sum of its proper divisors (2909783372).

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

2640329140 is a wasteful number, since it uses less digits than its factorization.

2640329140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129087 (or 129085 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 2640329140 is about 51384.1331541167. The cubic root of 2640329140 is about 1382.1420804008.

The spelling of 2640329140 in words is "two billion, six hundred forty million, three hundred twenty-nine thousand, one hundred forty".