2921760 has 72 divisors (see below), whose sum is σ = 9975420. Its totient is φ = 778752.

The previous prime is 2921753. The next prime is 2921761. The reversal of 2921760 is 671292.

It can be written as a sum of positive squares in 2 ways, for example, as 2702736 + 219024 = 1644^2 + 468^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (2921761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426 + ... + 2454.

2^2921760 is an apocalyptic number.

2921760 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 2921760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4987710).

2921760 is an abundant number, since it is smaller than the sum of its proper divisors (7053660).

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

2921760 is a wasteful number, since it uses less digits than its factorization.

2921760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050 (or 2039 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 2921760 is about 1709.3156525347. The cubic root of 2921760 is about 142.9601010176.

The spelling of 2921760 in words is "two million, nine hundred twenty-one thousand, seven hundred sixty".