2723820 has 48 divisors (see below), whose sum is σ = 8322048. Its totient is φ = 660160.

The previous prime is 2723813. The next prime is 2723827. The reversal of 2723820 is 283272.

2723820 = 580² + 581² + ... + 587².

It is an interprime number because it is at equal distance from previous prime (2723813) and next prime (2723827).

It is not an unprimeable number, because it can be changed into a prime (2723827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1404 + ... + 2723.

It is an arithmetic number, because the mean of its divisors is an integer number (173376).

2^2723820 is an apocalyptic number.

2723820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2723820 is an abundant number, since it is smaller than the sum of its proper divisors (5598228).

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

2723820 is a wasteful number, since it uses less digits than its factorization.

2723820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150 (or 4148 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 2723820 is about 1650.3999515269. The cubic root of 2723820 is about 139.6559579498.

The spelling of 2723820 in words is "two million, seven hundred twenty-three thousand, eight hundred twenty".