2644380 has 96 divisors (see below), whose sum is σ = 8467200. Its totient is φ = 684864.

The previous prime is 2644357. The next prime is 2644381. The reversal of 2644380 is 834462.

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 (2644381) 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, 31819 + ... + 31901.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

2^2644380 is an apocalyptic number.

2644380 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 2644380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4233600).

2644380 is an abundant number, since it is smaller than the sum of its proper divisors (5822820).

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

2644380 is a wasteful number, since it uses less digits than its factorization.

2644380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 2644380 is about 1626.1549741645. The cubic root of 2644380 is about 138.2848558382.

The spelling of 2644380 in words is "two million, six hundred forty-four thousand, three hundred eighty".