2809380 has 48 divisors (see below), whose sum is σ = 8991360. Its totient is φ = 642048.

The previous prime is 2809363. The next prime is 2809409. The reversal of 2809380 is 839082.

2809380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2925 + ... + 3764.

It is an arithmetic number, because the mean of its divisors is an integer number (187320).

2^2809380 is an apocalyptic number.

2809380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2809380 is an abundant number, since it is smaller than the sum of its proper divisors (6181980).

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

2809380 is a wasteful number, since it uses less digits than its factorization.

2809380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6708 (or 6706 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2809380 is about 1676.1205207264. The cubic root of 2809380 is about 141.1031888875.

The spelling of 2809380 in words is "two million, eight hundred nine thousand, three hundred eighty".