244381440 has 144 divisors (see below), whose sum is σ = 814722048. Its totient is φ = 62312448.

The previous prime is 244381391. The next prime is 244381447. The reversal of 244381440 is 44183442.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 244381398 and 244381407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244381447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86937 + ... + 89703.

It is an arithmetic number, because the mean of its divisors is an integer number (5657792).

Almost surely, 2^244381440 is an apocalyptic number.

244381440 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 244381440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407361024).

244381440 is an abundant number, since it is smaller than the sum of its proper divisors (570340608).

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

244381440 is a wasteful number, since it uses less digits than its factorization.

244381440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814 (or 2800 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 244381440 is about 15632.7041806592. The cubic root of 244381440 is about 625.2054279382.

It can be divided in two parts, 24438 and 1440, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 244381440 in words is "two hundred forty-four million, three hundred eighty-one thousand, four hundred forty".