2644920 has 128 divisors (see below), whose sum is σ = 9216000. Its totient is φ = 673920.

The previous prime is 2644919. The next prime is 2644921. The reversal of 2644920 is 294462.

2644920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2644919) and next prime (2644921).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644921) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 33441 + ... + 33519.

It is an arithmetic number, because the mean of its divisors is an integer number (72000).

2^2644920 is an apocalyptic number.

2644920 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 2644920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4608000).

2644920 is an abundant number, since it is smaller than the sum of its proper divisors (6571080).

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

2644920 is a wasteful number, since it uses less digits than its factorization.

2644920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 2644920 is about 1626.3210015246. The cubic root of 2644920 is about 138.2942680936.

It can be divided in two parts, 264 and 4920, that added together give a square (5184 = 72²).

The spelling of 2644920 in words is "two million, six hundred forty-four thousand, nine hundred twenty".