2722890 has 64 divisors (see below), whose sum is σ = 7309440. Its totient is φ = 645120.

The previous prime is 2722883. The next prime is 2722891. The reversal of 2722890 is 982272.

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

It is not an unprimeable number, because it can be changed into a prime (2722891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9550 + ... + 9830.

It is an arithmetic number, because the mean of its divisors is an integer number (114210).

2^2722890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2722890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3654720).

2722890 is an abundant number, since it is smaller than the sum of its proper divisors (4586550).

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

2722890 is a wasteful number, since it uses less digits than its factorization.

2722890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2722890 is about 1650.1181775861. The cubic root of 2722890 is about 139.6400617911.

The spelling of 2722890 in words is "two million, seven hundred twenty-two thousand, eight hundred ninety".