2722240 has 56 divisors (see below), whose sum is σ = 6656832. Its totient is φ = 1059840.

The previous prime is 2722231. The next prime is 2722241. The reversal of 2722240 is 422272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2722241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14950 + ... + 15130.

It is an arithmetic number, because the mean of its divisors is an integer number (118872).

2^2722240 is an apocalyptic number.

2722240 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 2722240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3328416).

2722240 is an abundant number, since it is smaller than the sum of its proper divisors (3934592).

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

2722240 is a wasteful number, since it uses less digits than its factorization.

2722240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 2722240 is about 1649.9212102401. The cubic root of 2722240 is about 139.6289494235.

Subtracting from 2722240 its reverse (422272), we obtain a cube (2299968 = 132³).

The spelling of 2722240 in words is "two million, seven hundred twenty-two thousand, two hundred forty".