2721380 has 12 divisors (see below), whose sum is σ = 5714940. Its totient is φ = 1088544.

The previous prime is 2721371. The next prime is 2721401. The reversal of 2721380 is 831272.

It can be written as a sum of positive squares in 2 ways, for example, as 1098304 + 1623076 = 1048^2 + 1274^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68015 + ... + 68054.

It is an arithmetic number, because the mean of its divisors is an integer number (476245).

2^2721380 is an apocalyptic number.

2721380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2721380 is an abundant number, since it is smaller than the sum of its proper divisors (2993560).

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

2721380 is a wasteful number, since it uses less digits than its factorization.

2721380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136078 (or 136076 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2721380 is about 1649.6605711479. The cubic root of 2721380 is about 139.6142441876.

The spelling of 2721380 in words is "two million, seven hundred twenty-one thousand, three hundred eighty".