2721403440 has 320 divisors, whose sum is σ = 11277849600. Its totient is φ = 589234176.

The previous prime is 2721403423. The next prime is 2721403441. The reversal of 2721403440 is 443041272.

2721403440 is a `hidden beast` number, since 2 + 7 + 214 + 0 + 3 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2721403441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 282544 + ... + 292016.

It is an arithmetic number, because the mean of its divisors is an integer number (35243280).

Almost surely, 2^2721403440 is an apocalyptic number.

2721403440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2721403440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5638924800).

2721403440 is an abundant number, since it is smaller than the sum of its proper divisors (8556446160).

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

2721403440 is a wasteful number, since it uses less digits than its factorization.

2721403440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9521 (or 9509 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 2721403440 is about 52167.0723732893. The cubic root of 2721403440 is about 1396.1464503189.

The spelling of 2721403440 in words is "two billion, seven hundred twenty-one million, four hundred three thousand, four hundred forty".