244399440 has 80 divisors (see below), whose sum is σ = 762004800. Its totient is φ = 64797696.

The previous prime is 244399439. The next prime is 244399447. The reversal of 244399440 is 44993442.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244399447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40116 + ... + 45804.

It is an arithmetic number, because the mean of its divisors is an integer number (9525060).

Almost surely, 2^244399440 is an apocalyptic number.

244399440 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 244399440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381002400).

244399440 is an abundant number, since it is smaller than the sum of its proper divisors (517605360).

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

244399440 is a wasteful number, since it uses less digits than its factorization.

244399440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5884 (or 5878 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 244399440 is about 15633.2798861915. The cubic root of 244399440 is about 625.2207774692.

The spelling of 244399440 in words is "two hundred forty-four million, three hundred ninety-nine thousand, four hundred forty".