2721323240 has 32 divisors (see below), whose sum is σ = 6124605480. Its totient is φ = 1088239872.

The previous prime is 2721323239. The next prime is 2721323261. The reversal of 2721323240 is 423231272.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2712118084 + 9205156 = 52078^2 + 3034^2 .

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, 206942 + ... + 219698.

Almost surely, 2^2721323240 is an apocalyptic number.

2721323240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2721323240 is an abundant number, since it is smaller than the sum of its proper divisors (3403282240).

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

2721323240 is a wasteful number, since it uses less digits than its factorization.

2721323240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18101 (or 18097 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 2721323240 is about 52166.3036835082. The cubic root of 2721323240 is about 1396.1327353310.

The spelling of 2721323240 in words is "two billion, seven hundred twenty-one million, three hundred twenty-three thousand, two hundred forty".