1285108664 has 64 divisors (see below), whose sum is σ = 2826109440. Its totient is φ = 536376960.

The previous prime is 1285108663. The next prime is 1285108667. The reversal of 1285108664 is 4668015821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285108661) 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, 1210694 + ... + 1211754.

It is an arithmetic number, because the mean of its divisors is an integer number (44157960).

Almost surely, 2^1285108664 is an apocalyptic number.

1285108664 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 1285108664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1413054720).

1285108664 is an abundant number, since it is smaller than the sum of its proper divisors (1541000776).

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

1285108664 is a wasteful number, since it uses less digits than its factorization.

1285108664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 1285108664 is about 35848.4122939915. The cubic root of 1285108664 is about 1087.2096132938.

The spelling of 1285108664 in words is "one billion, two hundred eighty-five million, one hundred eight thousand, six hundred sixty-four".