1282288644 has 432 divisors, whose sum is σ = 4473268800. Its totient is φ = 317447424.

The previous prime is 1282288643. The next prime is 1282288649. The reversal of 1282288644 is 4468822821.

It is a self number, because there is not a number n which added to its sum of digits gives 1282288644.

It is not an unprimeable number, because it can be changed into a prime (1282288643) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11764062 + ... + 11764170.

Almost surely, 2^1282288644 is an apocalyptic number.

1282288644 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 1282288644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2236634400).

1282288644 is an abundant number, since it is smaller than the sum of its proper divisors (3190980156).

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

1282288644 is a wasteful number, since it uses less digits than its factorization.

1282288644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 153 counting only the distinct ones).

The product of its digits is 393216, while the sum is 45.

The square root of 1282288644 is about 35809.0581277978. The cubic root of 1282288644 is about 1086.4137796282.

The spelling of 1282288644 in words is "one billion, two hundred eighty-two million, two hundred eighty-eight thousand, six hundred forty-four".