1287448344 has 240 divisors, whose sum is σ = 4518914400. Its totient is φ = 339437952.

The previous prime is 1287448343. The next prime is 1287448363. The reversal of 1287448344 is 4438447821.

1287448344 is a `hidden beast` number, since 128 + 7 + 4 + 483 + 44 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1287448344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287448343) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 411217 + ... + 414335.

It is an arithmetic number, because the mean of its divisors is an integer number (18828810).

Almost surely, 2^1287448344 is an apocalyptic number.

1287448344 is a gapful number since it is divisible by the number (14) 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 1287448344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2259457200).

1287448344 is an abundant number, since it is smaller than the sum of its proper divisors (3231466056).

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

1287448344 is a wasteful number, since it uses less digits than its factorization.

1287448344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164 (or 3144 counting only the distinct ones).

The product of its digits is 688128, while the sum is 45.

The square root of 1287448344 is about 35881.0304199865. The cubic root of 1287448344 is about 1087.8690077121.

The spelling of 1287448344 in words is "one billion, two hundred eighty-seven million, four hundred forty-eight thousand, three hundred forty-four".