2720013640 has 32 divisors (see below), whose sum is σ = 6134605560. Its totient is φ = 1085414400.

The previous prime is 2720013589. The next prime is 2720013661. The reversal of 2720013640 is 463100272.

It can be written as a sum of positive squares in 4 ways, for example, as 2033468836 + 686544804 = 45094^2 + 26202^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63921 + ... + 97600.

Almost surely, 2^2720013640 is an apocalyptic number.

2720013640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2720013640 is an abundant number, since it is smaller than the sum of its proper divisors (3414591920).

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

2720013640 is a wasteful number, since it uses less digits than its factorization.

2720013640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161953 (or 161949 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 2720013640 is about 52153.7500089878. The cubic root of 2720013640 is about 1395.9087427312.

The spelling of 2720013640 in words is "two billion, seven hundred twenty million, thirteen thousand, six hundred forty".