2644398 has 24 divisors (see below), whose sum is σ = 5787288. Its totient is φ = 872592.

The previous prime is 2644387. The next prime is 2644399. The reversal of 2644398 is 8934462.

It is a happy number.

2644398 is a `hidden beast` number, since 2 + 644 + 3 + 9 + 8 = 666.

2644398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2¹⁹ + 6 + 4 + 4⁷ + 3 + 9⁴ + 8⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644399) 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 11 ways as a sum of consecutive naturals, for example, 1240 + ... + 2612.

It is an arithmetic number, because the mean of its divisors is an integer number (241137).

2^2644398 is an apocalyptic number.

2644398 is an abundant number, since it is smaller than the sum of its proper divisors (3142890).

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

2644398 is a wasteful number, since it uses less digits than its factorization.

2644398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488 (or 1485 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 2644398 is about 1626.1605086830. The cubic root of 2644398 is about 138.2851696007.

Subtracting 2644398 from its reverse (8934462), we obtain a square (6290064 = 2508²).

The spelling of 2644398 in words is "two million, six hundred forty-four thousand, three hundred ninety-eight".